He has no refined post moves
are you serious?
post moves are all he does have. it's the only reason anybody gives a crap about him. he might be a top 5 post-playing big man in the entire country and he's not even in the NBA yet, because post play is pathetic today. if this were the 80s nobody would care about the guy.
his flaws are that he's passive, inconsistent, and not really strong or quick. but lack of a post game? where did you get that from? it's the only reason he's in the first round, much less considered the future of post play.