I agree. In particular, the talent options are lacking. There are pretty clear cut best options and very little that will define your character. Lone Wolf and Glass Cannon have the most dramatic pros/cons, but don't actually specialize your character that much. Zombie is interesting but seems pretty weak.
Some more pro/con type talents, some that really force you to specialize but reward you for it, some that do the opposite and make more hybrid characters a better option, etc. etc.
I am also playing 2 mages, and they have literally the exact same combat stats and talents. The only difference is in a few non-combat skills that wouldn't make sense to take on both characters.