I have respect for Diego's skills...he may be a weirdo but the dude has drive and confidence that not many fighters can match. He's a great athlete, great wrestling and elite cardio.
The problem in my opinion is BJ cannot be taken down or knocked out at LW. Hell, he can't even be knocked DOWN at LW, then add his jitz (also best in the LW division) and finally fixing the only hole in his game - cardio.
I don't really like or dislike BJ, but i love watching him fight. Currently he has zero weaknesses. I don't think i can honestly say any of the other 4 champs are without weakness.
BJ is a beast who is now in shape and motivated. Diego's only hope in hell is to win a decision.