He started at MW, look up his run through the Dream MW GP if you haven't seen it. Good shit. Immediately after he moved to LHW saying his body was still growing and making 185 was just not possible much longer.
Obviously he's realized that he's just not strong enough to control these guys like he'd like to. Really not sure how he'll do in the UFC at 185. We haven't seen him fighting elite guys enough to truly judge. He SHOULD do well, but I haven't seen anything to prove he can avoid the wrestling of your Sonnen, Weidman, and Okami types. He hasn't fought a truly elite guy since the aforementioned MW GP, and that shit was 5 years ago. Anyone pretending they know for a fact how he'll do is full of shit.