He is definitely one of the most gifted fighters out there. Great striking with heavy hands and amazing judo and TDD. His BJJ is truly "prodigy" like. And of his four losses, 3 were not at his "natural" weight class, one of them being at LHW against Machida!
I don't think BJ is regarded so highly so much for how well he's done in his fights per se, I think it is more with how much talent this guy has and what he could become if he worked his cardio more. I always want to see BJ fight because he can do so many things that no one in the MMA world can do and it is truly impressive.
But yes, it sucks that he has no class and that he can walk around getting title shots left and right.