He can definitely work on some things, none of these fighters are perfect, but he's definitely not hyped. He's one of the most well rounded and complete fighters in the division. The fact he has things to work on just means he hasn't reached his ceiling, and he just beat the #6 guy convincingly. Imo that's pretty fucking good.
That said, yes, throwing a rear hand uppercut as a lead punch is very disheartening. Before you call the man all hype, let's see how he comes back from this fight and if he adjusts his decision making and defense.
Regardless being ranked at WW and a 100% finish rate don't happen by mistake.