Come on. Dude is only in his 2nd season, too soon to say that.
His 2 main weaknesses are his three point shooting and his defensive effort.
I am a bit concerned with his three point shooting, especially since his free throw shooting percentage dropped this season too. Hopefully this season is a blip and he starts to turn things around soon.
His defense on the other hand, I am not really that worried about. I think he takes time off there bcos he carries such a heavy load on offense. He has the tools to be a good defender and I think the more matured he gets, he will find the right balance.