Goals: Strengthen class fantasies through immersion, distinctiveness between classes, and empowerment.
Example: Death Knight Runes - you can't push buttons you want to push when you want to push them. Now, one type of rune.
Example: Fury Warriors and chargers - when you push whirlwind, you aoe for several seconds. No more raging blow charges.
Example: Arcane charges are now a resource in addition to mana.
Example: New Arcane Mastery: Savant - increases how much mana you have.
Example: Survival hunter is now a melee spec with their beast: abilities like harpoon, raptor strike mongoose bite, etc
Example: Discipline priest was too narrow - double down on atonement, it's now the core healing mechanic - you will mainly heal through damage.
Example: Subtlety rogues need better version of shadow dance as a passive - 20% chance for combo point to reenter stealth, and that stealth does not break on damage. Also - Shadow strike teleports rogue to target and does double ambush damage. "A true ninja" - HAT removed but replaced by fantasy-central things.
Example: Demonology Warlock are about summoning hordes of demons, buffing them, and sending them out. Not about metamorphosis anymore.
Example: Guardian Druid shouldn't be about dodge - now it's increased health, increased survivability, etc. No more dancing circus bear.
Example: Shadow Priests - related to Old Gods is a class fantasy with insanity. New Resource is insanity - no mana or orbs. Tap into the power of going insane, shadow form grows darker and darker and grow tentacles and turn into Void Form - this insanity is fleeting but slowly drains. Longer you stay in that form, the more damage.
Fewer "theme" rows
Hundreds of new talents coming out, more than there's ever been in any previous expansion.