He definitely looks a lot smaller on TUF than I've ever seen him in an interview when not cutting for a fight. That's definitely a good thing, and it may be the result of a more balanced diet, or just less muscle/strength building and more cardiovascular conditioning.
Either way he'll be a better conditioned fighter with less mass to carry around, and a deeper gas tank. However, none of that matter if he doesn't have any stand up skills. He still won't be able to hold onto the belt unless he fixes that hole in his game, he won't even be able to get it from Velasquez without filling that hole.
Sig courtesy of that photo-matic magician limba
I went out the way that I fight. I went out on my shield. That’s it. Done. --Chuck Liddell
My goal is to end my opponent --Carlos Condit