He lunges with his punches, throws an uppercut by dropping his hands and raising his chin, and he rarely puts together more than two or three punches at a time. When he does throw his right hand properly he hits pretty good. Guerrero caught him clean a couple times but he didn't seem sharp- didn't move well or punch crisp- at all and mostly let Thurman do what he wanted.
A good live opponent, maybe one in the same weight class, would make him pay for those mistakes. And he has spells where his footwork is utterly random.