3.1 Changes

Priest

Abolish Disease: Now cleanses a disease every 3 seconds, down from 5. Duration reduced from 20 seconds, down to 12 sec.
Devouring Plague: This spell now has a new icon.
New! Divine Hymn redesigned: You recite a Holy hymn, summoning the power of the Divine to assist you in your time of need. Heals 3 nearby lowest-health friendly party or raid targets for 4960-5208 every 2 seconds for 8 seconds, and increases healing done to them by 15% for 8 seconds. Maximum of 12 heals. The Priest must channel to maintain the spell. Cooldown increased to 6 minutes, up from 5.
Divine Spirit is now trainable at level 31.
Holy Nova: Mana cost reduced approximately 20%.
Improved Holy Concentration removed.
New! Hymn of Hope redesigned: You recite a Holy hymn, restoring hope to those in despair. Restores 3% mana to 3 nearby low mana friendly party or raid targets every 2 seconds for 8 seconds, and temporarily increases their total maximum mana by 20% for 8 seconds. After the effect expires, the mana is lost. Maximum of 12 mana restorations. The Priest must channel to maintain the spell. Cooldown increased to 6 minutes, up from 5.
New! Mental Agility, Inner Focus, Shadow Reach, Shadow Focus and Shadow Affinity now all affect Psychic Horror.
Prayer of Healing: This spell now heals the target's party, rather than being limited to just your direct party.
Changed! Shadowfiend: Health scaling increased. Now receives 30% of the master's spell power. Mana return increased to 5%, up from 4%. The Shadowfiend now returns mana when its melee attacks land, rather than when it deals damage. No longer has a 75% reduced chance to be hit by melee, ranged and spells. Movement speed normalized to player movement speed. Tooltip revised.
Talents

Discipline
Changed! Divine Aegis - Divine Aegis effects will now stack, however the amount absorbed cannot exceed 125*level (of the target). It will also now take into account total healing including overhealing.
New! Improved Divine Spirit: This talent has been removed.
Grace: Duration increased to 15 seconds, but now is only limited to one target.
New! New Talent: Improved Flash Heal: Reduces the mana cost of your Flash Heal by 5/10/15%, and increases the critical effect chance of your Flash Heal by 4/7/10% on friendly targets at or below 50% health.
Changed! Grace: This talent no longer decreases damage done to the target, but the duration has increased to 15 seconds and the healing bonus has increased from 2% to 3%. This affect now cannot be applied to more than one target at a time.
Improved Power Word: Fortitude - Now also increases your total Stamina by 2/4%.
Meditation and Improved Power Word: Shield have changed locations with each other.
Meditation: Now grants 17/33/50% of mana regeneration while casting.
Mental Agility: Reduced to 3 points (4/7/10%), down from 5.
New Talent: Soul Warding: Reduces the cooldown of your Power Word: Shield ability by 4 sec., and reduces the mana cost of your Power Word: Shield by 30%.
Penance: Damage increased approximately 30%. This spell can now be cast on yourself.
Power Infusion: This effect now has a new spell effect.
Renewed Hope: This talent also now allows you to proc the Renewed Hope buff on all party/raid members every time you cast Power Word: Shield, reducing damage taken by 3%. Lasts 20 sec.
Unbreakable Will: Increased from 3/6/9/12/15% to 6/12/18/24/30%.

Holy
Circle of Healing: Healing increased by approximately 40%.
Holy Concentration re-designed: Mana regeneration is increased by 16/32/50% for 8 sec after you critically heal with Flash Heal, Greater Heal, Binding Heal or Renew.
New Talent: Empowered Renew: Your Renew spell gains an additional 5/10/15% of your bonus healing effects, and your Renew will instantly heal the target for 5/10/15% of the total periodic effect.
Serendipity re-designed: When you heal with Binding Heal or Flash Heal, the cast time of your next Greater Heal or Prayer of Healing spell is reduced by 6/12/20%. Stacks up to 3 times. Lasts 20 sec.
Test of Faith: No longer increases critical effect chance of your heals, but healing done on targets lower than 50% health is increased from 2/4/6 to 4/8/12%.

Shadow
Blackout: This talent has been removed.
Darkness: This talent is now in tier-1, moved up from tier-6.
Dispersion: Now clears all snare and movement impairing effects and makes you immune to them while dispersed.
New Talent: Improved Devouring Plague: Increases the periodic damage done by your Devouring Plague by 5/10/15%, and when you cast Devouring Plague you instantly deal damage equal to 5/10/15% of its total periodic effect.
Melted Mind: Now also increases the periodic critical strike chance of your Shadow Word: Pain, Devouring Plague and Vampiric Touch spells by 3/6%.
Psychic Horror: Has been redesigned and is now a 1-point talent. You terrify the target, causing them to tremble in horror for 3 sec. and drop all weapons (disarm effect: including bows) for 10 sec. 1 minute cooldown. Instant cast. The horror effect can be dispelled, but the disarm cannot.
Improved Spirit Tap: Now grants 17/33% of mana regeneration while casting.
New Shadowform: Bonus damage from critical strike chance removed and replaced by the ability of those periodic damage spells to generate critical strikes.
Silence: Range increased to 30 yards.
Improved Spirit Tap: Now grants 83% of mana regeneration while casting.
New! Improved Vampiric Embrace duration increased to 5 minutes, up from 1 minute. PvP duration is now 60 seconds. Cooldown removed.
New! Vampiric Touch: When dispelled, Vampiric Touch will deal damage to the afflicted target.