Improved Drain Mana
Talent · AfflictionRemoved
Improved Drain ManaRank 1/2
Causes 15% of the Mana drained by your Drain Mana spell to damage the opponent.
Not in Forever
News
Classic vs Forever
Every talent and spell WoW Forever added, changed or removed, with the Classic tooltip next to the new one.
Warlock changes
Affliction
Improved Life TapRow 2to 1MovedTalent · Affliction
SuppressionMax rank 10%to 20%ChangedTalent · Affliction
Improved CorruptionReduces the casting time of your Corruption spell by 2 sec and increases the damage it deals by 10%.ChangedTalent · Affliction
MaledictionIncreases all periodic damage done by your Warlock spells by 5%.NewTalent · Affliction
Soul HarvestKilling a non-trivial target afflicted by your Drain Soul increases your Mana regeneration by 100% for 10 sec and allows…NewTalent · Affliction
Improved DrainsIncreases health drained or damage done by your Drain Life, Drain Soul, and Wrack spells by 20%.NewTalent · Affliction
Improved Curse of WeaknessIncreases the effect of your Curse of Weakness by 20%.RemovedTalent · Affliction- Improved Drain SoulGives you a 100% chance to get a 100% increase to your Mana regeneration for 10 sec if the target is killed by you while…RemovedTalent · Affliction
Improved Bane of AgonyWas Improved Curse of Agony; Max rank 6%to 10%; Ranks3to 2ChangedTalent · Affliction
Fel ConcentrationRanks 5to 3ChangedTalent · Affliction
Amplify CurseIncreases the effect of your next Curse of Weakness or Bane of Agony by 50%, or your next Curse of Exhaustion by 20%.…ChangedTalent · Affliction
PandemicIncreases the critical strike damage bonus of your Corruption, Bane of Agony, Bane of Doom, Drain Soul, Drain Life,…NewTalent · Affliction
MalevolenceIncreases the critical effect chance of your Shadow spells by 5%.NewTalent · Affliction
NightfallGives your Corruption, Drain Soul, Drain Life, and Wrack spells a 4% chance to cause you to enter a Shadow Trance after…ChangedTalent · Affliction
Curse of Exhaustion10%to 30%; Row5to 4ChangedTalent · Affliction
Grim ReachIncreases the range of your Affliction spells by 20%.RemovedTalent · Affliction
Improved Drain ManaCauses 30% of the Mana drained by your Drain Mana spell to damage the opponent.RemovedTalent · AfflictionClassic Forever 
Siphon Life15 healthto 11 healthChangedTalent · Affliction
Soul SiphonWas Improved Drain Life; Row 2to 5; Ranks5to 3ChangedTalent · Affliction- Improved Curse of ExhaustionIncreases the speed reduction of your Curse of Exhaustion by 20%.RemovedTalent · Affliction
Shadow MasteryMax rank 10%to 5%; Column2to 3; No longer needs Siphon LifeChangedTalent · Affliction
WrackTears the target apart from within, inflicting 36 Shadow damage every 1 sec and increasing the damage they take from…NewTalent · Affliction
Dark PactDrains 150 of your pet's Mana, returning 100% to you.RemovedTalent · Affliction- Bane of AgonyWas Curse of Agony; Max rank
1044to 552RenamedSpell · Affliction 
Bane of DoomWas Curse of Doom; 3200to 1742RenamedSpell · Affliction
Curse of the ElementsRanks 3to 4Trained earlierSpell · Affliction- CorruptionMax rank
822to 438ChangedSpell · Affliction - Curse of WeaknessMax rank
31to 37ChangedSpell · Affliction - Life TapMax rank
424 healthto 848 HealthChangedSpell · Affliction - Drain SoulMax rank
455to 420ChangedSpell · Affliction 
Curse of RecklessnessMax rank 640to 505ChangedSpell · Affliction- Drain LifeMax rank
71 healthto 51 healthChangedSpell · Affliction - Drain ManaCost
noneto 95 Mana; CastInstantto ChanneledChangedSpell · Affliction 
Curse of TonguesForces the target to speak in Demonic, increasing the casting time of all spells by 60%. Only one Curse per Warlock can…ChangedSpell · Affliction
Death CoilMax rank 476to 460; Cost565 Manato 600 ManaChangedSpell · Affliction
Demonology
Improved Health FunnelRow 2to 1ChangedTalent · Demonology
Improved ImpIncreases the damage of your Imp's Firebolt spell by 30% and the effect of its Fire Shield spell by 30%.ChangedTalent · Demonology
Demonic EmbraceIncreases your total Stamina by 15%.ChangedTalent · Demonology
Unholy PowerMax rank 20%to 10%; Row4to 1ChangedTalent · Demonology
Improved HealthstoneIncreases the amount of Health restored by your Healthstone by 20%.RemovedTalent · Demonology
Demonic AegisIncreases the effectiveness of your Demon Skin and Demon Armor spells by 30%.NewTalent · Demonology
Fel VitalityWas Fel Intellect; Ranks 5to 3ChangedTalent · Demonology
Demonic EnergiesYou heal your pet for 15% of all spell damage you deal. When you gain Mana from Life Tap, your summoned demon gains 100%…NewTalent · Demonology
Demonic Sacrifice3%to 2%;2%to 3%; Row5to 3ChangedTalent · Demonology
Master SummonerRow 4to 3; No longer needs Fel DominationChangedTalent · Demonology
Fel StaminaIncreases the maximum Health of your Imp, Voidwalker, Succubus, Incubus, and Felhunter by 15%.RemovedTalent · Demonology
DecimationReduces the cooldown of your Soul Fire spell by 90%. When you cast Shadow Bolt or Searing Pain on an enemy below 35%…NewTalent · Demonology
Fel DominationRow 3to 4; Now needs Master SummonerChangedTalent · Demonology
Demonic BrandYour Searing Pain generates 50% less threat and brands the target for 10 sec. Your pet's next 6 attacks against the…NewTalent · Demonology
Improved FelhunterIncreases the Attack Power reduction of your Felhunter's Tainted Blood, the healing of its Devour Magic, and the…NewTalent · Demonology
Soul LinkRow 7to 5ChangedTalent · Demonology
Demonic KnowledgeIncreases your spell damage and your Demon pet's spell damage by up to 100% of your level while you have a summoned…NewTalent · Demonology
Improved FirestoneIncreases the bonus Fire damage from Firestones and the Firestone effect by 30%.RemovedTalent · Demonology
Improved Subjugate DemonReduces the Attack Speed and Casting Speed penalty of your Subjugate Demon spell by 10% and reduces the resist chance by…RemovedTalent · Demonology
Master DemonologistMax rank 20%to 10%; No longer needs Unholy PowerChangedTalent · Demonology
Demonic PactYour Demonic Sacrifice effect is no longer cancelled by summoning a different Demon pet. Resummoning the sacrificed pet…NewTalent · Demonology
Improved SpellstoneIncreases the amount of damage absorbed by your Spellstone by 30%.RemovedTalent · Demonology
Portal of SummoningBegins a ritual that creates a summoning portal. The summoning portal can be used by 2 party or raid members to summon a…NewSpell · Demonology- Demon SkinProtects the caster, increasing armor by 120 and increases health regeneration by 5 health per 5 sec. for 30 min.ChangedSpell · Demonology
- Create HealthstoneMax rank
1200 healthto 1440 healthChangedSpell · Demonology - Health FunnelMax rank
52to 61ChangedSpell · Demonology - Demon ArmorProtects the caster, increasing armor by 570, Shadow resistance by 15 and increases health regeneration by 15 health per…ChangedSpell · Demonology
Create FirestoneCreates a Major Firestone which can be used to enchant your weapon with Fire, increasing your spell critical strike…ChangedSpell · Demonology- Create SpellstoneCreates a Major Spellstone which can be used to enchant your weapon with Shadow, increasing your spell haste by 2% and…ChangedSpell · Demonology
Destruction
Destructive ReachRow 4to 1ChangedTalent · Destruction
Improved Shadow BoltYour Shadow Bolt critical strikes increase Shadow damage taken by the target from your attacks by 20% for 12 sec.ChangedTalent · Destruction
BaneRow 2to 1ChangedTalent · Destruction
Molten SkinReduces all damage taken by 10%.NewTalent · Destruction
CataclysmMax rank 5%to 10%; Row1to 2; Ranks5to 3ChangedTalent · Destruction
AftermathMax rank 10%to 100%ChangedTalent · Destruction
RuinRow 5to 3; No longer needs Devastation; Ranks1to 5ChangedTalent · Destruction
Shadowburn91 to 104to 65 to 74;5 secto 8 sec; Column4to 3ChangedTalent · Destruction
DevastationIncreases the critical strike chance of your Destruction spells by 5%.RemovedTalent · Destruction
Improved FireboltReduces the casting time of your Imp's Firebolt spell by 1 sec.RemovedTalent · Destruction
Improved Lash of PainReduces the cooldown of your Succubus' and Incubus' Lash of Pain spell by 6 sec.RemovedTalent · Destruction
IntensityRanks 2to 3ChangedTalent · Destruction
Agonizing FlamesWas Improved Searing Pain; Column 4to 2; Ranks5to 3ChangedTalent · Destruction
Conflagrate249 to 316to 88 to 111; Row7to 4; No longer needs Improved ImmolateChangedTalent · Destruction
PyroclasmGives your Soul Fire spell a 26% chance to Stun the target for 3 sec, and your Rain of Fire and Hellfire spells a 26%…ChangedTalent · Destruction
Bane of HavocAfflicts the target for 5 min, causing 15% of all damage done by the Warlock to other targets to also be dealt to the…NewTalent · Destruction
Fire and BrimstoneIncreases the critical strike chance of your Conflagrate spell by 25%.NewTalent · Destruction
Improved ImmolateIncreases the initial damage of your Immolate spell by 25%.RemovedTalent · Destruction
Shadow and FlameHitting an enemy with Conflagrate increases all Shadow damage you deal by 10% for 20 sec, and hitting an enemy with…NewTalent · Destruction
EmberstormIncreases the damage done by your Fire spells by 10%.RemovedTalent · Destruction
IncinerateDeals 100 to 114 Fire damage to your target and an additional 25% damage if the target is afflicted by Immolate.NewTalent · Destruction- ImmolateMax rank
279to 158;510to 275ChangedSpell · Destruction - Shadow BoltMax rank
482 to 538to 253 to 283ChangedSpell · Destruction - Searing PainMax rank
208 to 244to 107 to 126ChangedSpell · Destruction 
Rain of FireMax rank 912to 884ChangedSpell · Destruction
HellfireMax rank 213to 210ChangedSpell · Destruction- Soul FireMax rank
715 to 894to 390 to 487ChangedSpell · Destruction
Mounts
What changed during the beta, update by update, is in the patch notes. To try a build, use the talent calculator.