I wouldn't say it is broken on a fundamental level, but I think there are definitely 3 things that should change:
1.) The incentive to build balanced characters should be higher with meaningful changes to dialogues with smart/charming/charismatic/etc characters. Higher vendor Identifying costs, much more difficult sneaking and stealing, more of an emphasis on lock-picking rather then putting the keys right next to chests, etc. Give my characters a reason to be more versatile.
2.) Advanced difficulty option, perhaps something beyond just increasing health. Make them avoid triggering attacks of opportunity all the time (seriously my Rouge Killed Evelyn entirely with attacks of opportunity). Make them avoid hazardous ground effect. Make them focus on the reasonable targets, not the obvious ones(as in: Hit the frail guy with the robe, not the Armoured Hulk carrying a shield).
In short: Improve enemies in a way that makes combat more tactical and challenging without turning everything into "bulletsponges"
3.) Re-balance all abilities and spells, as well as their cool-downs and action point cost. At the moment balance for those is all over place, like Small Fireball costing 10 Base action points, and being significantly less effective than the 5 costing Whirlwind of the warrior etc. Also having the weak and the strong version of an ability (like in the warriors case) can cause some serious silliness.
And to reiterate: I want the game to challenge me, not challenge myself because the game fails to do so.
