Fun game. Here are my thoughts as a warrior:
Enrage is pointless to put more than a few points into. If there was a bot option to use it while the buff is inactive it could be useful.
Thunderstrike is complete trash relative to bladestorm. Probably just needs a bigger aoe.
Regen falls off extremely hard and not worth it once you get enough health/mana.
Not sure what armor pen even does.
Some kind of auto town option/auto sell could be interesting.
It's a cool game just not sure how long it would stay fun. I feel like the game needs the option where all of your characters could party up together or something.