First I want to say I bought this game long ago, but finally tried the early access thanks to a friends recommendation, and I absolutely love it!
Anyway, Fast Adaptation interacts in a way that feels a bit exploitable:
You can have a 2h wielding warrior shoot once with a bow as combat starts with a 5% chance to hit, just to get a free 15% hit bonus when melee starts.
It feels strange that the bonus sticks when weapon is changed.