I think there is more to Crocops issues in the ufc.
He stopped kicking and was acting like a guy with a bad back, walking around all stiff. Old school minded guys like him would still fight for the payday rather than retire, but there was something going on with that guy.
I don't buy the whole cage/ring thing either. I think the rules and location are a bigger adjustment to make. Fighters say that if you are fighting in the east or coming from far east to west, it is wise to stay in the country long enough to get used to being there before your fight or it takes a heavy toll.
I think the Pride guys ran into some of this coming over, just like I think some of the guys from the ufc that hopped over there for a fight here and there had the same issues.