He has a great attitude. He hustles. He is still raw, and the game is simply too fast for him, but if he really is taking the game as seriously as it appears, he will learn how to get position in the paint. He will learn an up and under. He will learn how to recognize what defenses are giving him faster than he does now. By the middle of next season, maybe he can be a guy off the bench that could spell the 3, 4 or 5?
IMO, biggest skill that he needs to learn is how to box out, and go up strong.
For those saying he's a lost cause, consider that he's basically a freshman since he barely got off the bench last year.