Mage -
New level 90 talents. Remove what is there now and bake it into the class, then create something new that we want to use (not 3 unique polymorph spells). Really, the idea behind it is fine, but having as the final talent choice feels like a punishment for hitting max level. If Evocation/Invocation is kept, please remove the need to charge up before combat. I don't mind having a 1 min maintenance buff, but it sucks balls that I need to take the time to charge up before combat begins just to be at normal power, especially while not raiding.
Rethink AoE. Mages have so many AoE spells and they suck for damage. Remember when mages were THE AoE class? Now we need to come up with wacky combos of spells to try and do as much damage as other classes can do with 1 button. Sure, Frost Orb is a great spell, but it has a 1 min CD.