Shame on SE for not describing and implementing one the most foundational aspects of the game. Fatigue is only viewed as penalizing SP gain atm. There is going to be much more to it than just that. I know the points you are penalized for will count towards something else in the future. And I think people will view these points as more valuable than exp. Until then people will hate it, but it isn't their fault. It's SE's for giving us a less than a half complete feature.