His problem is that he fights too aggressive. He can overwhelm a lot of opponents, but the smart fighters at the top will frustrate him unless he learns to pace himself and fight with controlled aggression, only exploding when it really makes sense.
Yeah maybe that's it. I just don't really see him being a Vitor kind of guy where he throws rapid punches to crush someone. He seems like the kind of guy who's be like a weaker version of Machida.
All the same, he has the skillset to go the distance.