Honestly I don't think the smokes should get to blind you. They already stop you in your tracks and damage you which makes you a sitting duck, so not being able to see on top of that is just unfair. I'd be okay with blindness being a selectable perk though (as an alternative to envenomed and vanish in smoke. Snare sucks anyway.) That is basically the only tweak I have for this game right now as far as class balance is concerned.