Classic vs Forever: every talent and spell change by class · stillsixty

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 3 to 2; Ranks 5 to 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 5 to 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 · Discipline
Mental AgilityRow 4 to 3; Ranks 5 to 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%; Column 3 to 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%; Row 5 to 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 sec~~ to 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 54 to 70ChangedSpell · Discipline
Power Word: ShieldMax rank ~~942 damage~~ to 928 damageChangedSpell · Discipline
Power Word: Shield
Spell · DisciplineChanged
Classic
Power Word: ShieldRank 10/10
500 Mana40 yd range
Instant4 sec cooldown
Draws on the soul of the party member to shield them, absorbing ~~942~~ damage. Lasts 30 sec. While the shield holds, spellcasting will not be interrupted by damage. Once shielded, the target cannot be shielded again for 15 sec.
Forever
Power Word: ShieldRank 10/10
500 Mana40 yd range
Instant4 sec cooldown
Draws on the soul of the party member to shield them, absorbing 928 damage. Lasts 30 sec. While the shield holds, spellcasting will not be interrupted by damage. Once shielded, the target cannot be shielded again for 15 sec.
During the beta
- September 24 update · Change
StarshardsMax rank ~~936~~ to 1800; Cooldown ~~none~~ to 30 secChangedSpell · Discipline
Elune's Grace~~10%~~ to 50%; Cost ~~60 Mana~~ to 3% of base manaChangedSpell · Discipline
FeedbackCost ~~580 Mana~~ to 230 ManaChangedSpell · Discipline
Mana BurnMax rank ~~789~~ to 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 54 to 70ChangedSpell · Discipline
Prayer of SpiritPower infuses all party and raid members, increasing their Spirit by 40 for 1 hr.ChangedSpell · Discipline

Holy

Shadow Magic

What changed during the beta, update by update, is in the patch notes. To try a build, use the talent calculator.