We just have to wait and see if his fundamental game can translate to the NBA. He dominated summer league with all the moves and shots in the book. I know it was just summer league, but big guys usually have a difficult time since the guards are typically ball-hogs.
I agree with his conditioning - I know he is a rookie in the preseason, but he could have given himself a real head start if he hit the gym a bit harder.
Overall, I am not worried. He is an extremely skilled player with great instincts. I definitely hope he pans out as a solid starter, but at the very least, he should stick around the league as a bench contributor.