Improved Power Word: Fortitude
Talent · DisciplineRemoved
Improved Power Word: FortitudeRank 1/2
Increases the effect of your Power Word: Fortitude and Prayer of Fortitude spells by 15%.
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.
Priest changes
Discipline
Power in LightYour Smite and Penance spells deal 10% increased damage to targets afflicted with your Holy Fire.NewTalent · Discipline
Wand SpecializationColumn 3to 2; Ranks5to 2ChangedTalent · Discipline
Twin DisciplinesIncreases the damage and healing of your instant cast spells by 5%.NewTalent · Discipline
Unbreakable WillIncreases your chance to resist Stun, Fear, and Silence effects by an additional 15%.RemovedTalent · Discipline
Silent ResolveRanks 5to 3ChangedTalent · Discipline
Holy PrecisionImproves your chance to hit with Holy spells by 18%.NewTalent · Discipline
Improved Power Word: ShieldMax rank 15%to 20%ChangedTalent · Discipline
MartyrdomRank 1 10%to 20%ChangedTalent · Discipline
Improved Power Word: FortitudeIncreases the effect of your Power Word: Fortitude and Prayer of Fortitude spells by 30%.RemovedTalent · DisciplineClassic Forever 
Mental AgilityRow 4to 3; Ranks5to 3ChangedTalent · Discipline
Inner FocusWhen activated, reduces the Mana cost of your next spell by 100% and increases its critical effect chance by 25% if it…ChangedTalent · Discipline
MeditationMax rank 15%to 50%; Column3to 4ChangedTalent · Discipline
Improved Inner FireIncreases the Armor bonus of your Inner Fire spell by 45% and increases its total charges by 12.ChangedTalent · Discipline
Mental StrengthMax rank 10%to 15%; Row5to 4ChangedTalent · Discipline
Soul WardingReduces the cooldown on your Power Word: Shield spell by 4 sec and reduces its mana cost by 15%.NewTalent · Discipline
Improved Mana BurnMax rank 0.5 secto 1.0 secChangedTalent · Discipline
PenanceLaunches a volley of holy light at the target, causing 45 Holy damage to an enemy, or 134 healing to an ally, instantly…NewTalent · Discipline
Renewed HopeYour heals from Flash Heal, Binding Heal, Lesser Heal, Heal, Greater Heal, and Penance gain 10% increased critical…NewTalent · Discipline
Divine SpiritNow trained at level 30, no talent pointRemovedTalent · Discipline
Divine AegisYour critical heals create a protective shield on the target, absorbing 15% of the amount healed. Lasts 12 sec.NewTalent · Discipline
Force of WillIncreases your spell damage by 5% and the critical strike chance of your offensive spells by 5%.RemovedTalent · Discipline
Power InfusionNeeds PenanceChangedTalent · Discipline
Confounding FlashConfuses up to 5 enemies within 8 yds for 3 sec. Any damage taken will break the effect.NewSpell · Discipline
Contingency PlanPlace a Holy ward on an ally for 30 sec. The next time this ally takes damage dropping their Health below 35%, they will…NewSpell · Discipline- Divine SpiritNo talent point neededNo longer a talentSpell · Discipline
- Power Word: FortitudeMax rank
54to 70ChangedSpell · Discipline - Power Word: ShieldMax rank
942 damageto 928 damageChangedSpell · Discipline 
StarshardsMax rank 936to 1800; Cooldownnoneto 30 secChangedSpell · Discipline
Elune's Grace10%to 50%; Cost60 Manato 3% of base manaChangedSpell · Discipline
FeedbackCost 580 Manato 230 ManaChangedSpell · Discipline- Mana BurnMax rank
789to 788ChangedSpell · Discipline 
LevitateAllows the caster to levitate, floating a few feet above the ground. While levitating, you will fall at a reduced speed…ChangedSpell · Discipline
Prayer of FortitudeMax rank 54to 70ChangedSpell · Discipline
Prayer of SpiritPower infuses all party and raid members, increasing their Spirit by 40 for 1 hr.ChangedSpell · Discipline
Holy
Twilight FocusWas Healing Focus; Ranks 2to 3ChangedTalent · Holy
Holy Nova29 to 34to 26 to 30;54 to 63to 50 to 57ChangedTalent · Holy
Blessed RecoveryRank 2 16%to 17%ChangedTalent · Holy- InspirationYour non-periodic critical heals increase your target's Armor by 25% for 15 sec.ChangedTalent · Holy
Improved HealingReduces the Mana cost of your Lesser Heal, Heal, Greater Heal, Penance, and Prayer of Mending spells by 15%.ChangedTalent · Holy
Searing LightIncreases your Holy damage done by 5%, and gives a 10% chance each time your Holy Fire spell deals periodic damage for…ChangedTalent · Holy
Binding HealHeals a friendly target and the caster for 236 to 284. Low threat.NewTalent · Holy
Litany of LightWhen you cast a healing spell, gain Mana equal to 10% of the base cost of the spell if your previous heal was a…NewTalent · Holy
Spirit of Redemption10 secto 15 secChangedTalent · Holy
Spiritual GuidanceMax rank 25%to 8%ChangedTalent · Holy
Improved Prayer of HealingReduces the Mana cost of your Prayer of Healing spell by 20%.RemovedTalent · Holy
Spiritual HealingRanks 5to 3ChangedTalent · Holy
Prayer of MendingPlaces a spell on the target that heals them for 172 the next time they take damage or receive non-periodic healing.…NewTalent · Holy
LightwellNow trained at level 40, no talent pointRemovedTalent · Holy
Divine GraceInstantly heals a friendly target below 50% Health for 1285 to 1513 and removes Weakened Soul from that target. Cannot…NewSpell · Holy
ChastiseChastise the target, causing 272 to 306 Holy damage and Immobilizing them for up to 2 sec. Only works against Humanoids.…NewSpell · Holy- LightwellNo talent point neededNo longer a talentSpell · Holy
Desperate PrayerMax rank 1340 to 1579to 1285 to 1513; Open to every raceAll racesSpell · Holy
Fear Ward10 minto 3 min; Cooldown30 secto 3 min; Open to every raceAll racesSpell · Holy
Lesser HealMax rank 143 to 165to 157 to 181ChangedSpell · Holy
SmiteMax rank 384 to 429to 167 to 186ChangedSpell · Holy
RenewMax rank 970 damageto 830 damageChangedSpell · Holy
ResurrectionBrings a dead player back to life with 750 health and 1000 mana. Cannot be cast when in combat.ChangedSpell · Holy- HealMax rank
734 to 827to 634 to 713ChangedSpell · Holy 
Flash HealMax rank 828 to 975to 774 to 910ChangedSpell · Holy- Holy FireMax rank
355 to 449to 184 to 232;145to 75ChangedSpell · Holy - Prayer of HealingMax rank
1041 to 1099to 631 to 667; Rangenoneto 40 ydChangedSpell · Holy 
Greater HealMax rank 1966 to 2194to 1853 to 2067ChangedSpell · Holy
Shadow Magic
Shadow FocusMax rank 10%to 5%; Row2to 1ChangedTalent · Shadow Magic
BlackoutColumn 3to 2MovedTalent · Shadow Magic
Spirit TapColumn 2to 3ChangedTalent · Shadow Magic
Shadow AffinityMax rank 25%to 30%ChangedTalent · Shadow Magic
Improved Shadow Word: PainColumn 2to 3MovedTalent · Shadow Magic
Shadow ReachRow 4to 2; Ranks3to 2ChangedTalent · Shadow Magic
Improved Mind BlastColumn 2to 1MovedTalent · Shadow Magic
Improved Psychic ScreamColumn 1to 2; Now needs BlackoutChangedTalent · Shadow Magic
Mind Flay75to 63ChangedTalent · Shadow Magic
Improved Mind FlayYour Mind Flay now deals 20% more damage, gains 10 yards increased range, but slows the target's movement speed by 20%.NewTalent · Shadow Magic
Improved FadeColumn 2to 1MovedTalent · Shadow Magic
Vampiric EmbraceRow 5to 4ChangedTalent · Shadow Magic
Shadow WeavingColumn 4to 3; Ranks5to 3ChangedTalent · Shadow Magic
SilenceNo longer needs Improved Psychic ScreamChangedTalent · Shadow Magic- Devouring ContagionReduces the mana cost of your Devouring Plague by 50%. Targets that die while Devouring Plague is active spreads it,…NewTalent · Shadow Magic
Improved Vampiric EmbraceIncreases the percentage healed by Vampiric Embrace by an additional 10%.RemovedTalent · Shadow Magic
Early DemiseIncreases Shadow Word: Death's critical strike chance on targets at or below 20% health by 30%.NewTalent · Shadow Magic
DarknessIncreases your Shadow damage done by 10%.ChangedTalent · Shadow Magic
ShadowformAssume Shadowform, increasing your Shadow damage by 10%, reducing the Mana cost of all Shadow spells by 50%, increasing…ChangedTalent · Shadow Magic
Dark SacrificeCannibalize 1600 of your own Health over 15 sec to gain 1920 Mana.NewSpell · Shadow Magic- Shadow Word: DeathA word of dark binding that inflicts 444 to 472 Shadow damage to the target. If your target is not killed by Shadow…NewSpell · Shadow Magic
Devouring PlagueMax rank 904to 848; Cooldown3 minto 1 min; Open to every raceAll racesSpell · Shadow Magic- Shadow Word: PainMax rank
852to 762ChangedSpell · Shadow Magic 
Hex of WeaknessMax rank 20to 204ChangedSpell · Shadow Magic- Mind BlastMax rank
508 to 537to 477 to 503ChangedSpell · Shadow Magic 
Touch of WeaknessMax rank 64to 56;20to 204ChangedSpell · Shadow Magic
ShadowguardMax rank 116to 96ChangedSpell · Shadow Magic
Prayer of Shadow ProtectionPower infuses all party and raid members, increasing their Shadow resistance by 60 for 20 min.ChangedSpell · Shadow Magic
What changed during the beta, update by update, is in the patch notes. To try a build, use the talent calculator.