Quote from: Blizzard (Source)

Druid

• Nurturing Instinct now increases your healing spells by 50%/100% (Rank 1/2) of your agility instead of your strength.

Mage

• Blink: For 2/4 (Rank 1/2) seconds after casting Blink, your chance to be hit by all attacks and spells is reduced by 25%. Blink costs 224 mana.
• Icy Veins: Hastens your spellcasting, increasing spell casting speed by 20% and gives you 100% chance to avoid interruption caused by damage while casting. Lasts 20 seconds.

Warlock

Lifetap now converts a % of your base health and mana.

Emberstorm changes:

• Emberstorm (Rank 1) Increases the damage done by your Fire spells by 2%, and reduces the cast time of your Incinerate spell by 2%.
• Emberstorm (Rank 2) Increases the damage done by your Fire spells by 4%, and reduces the cast time of your Incinerate spell by 4%.
• Emberstorm (Rank 3) Increases the damage done by your Fire spells by 6%, and reduces the cast time of your Incinerate spell by 6%.
• Emberstorm (Rank 4) Increases the damage done by your Fire spells by 8%, and reduces the cast time of your Incinerate spell by 8%.
• Emberstorm (Rank 5) Increases the damage done by your Fire spells by 10%, and reduces the cast time of your Incinerate spell by 10%.

Shaman

• Shamanistic Rage is no longer a magic ability and cannot be purged or mass dispelled in any way.