One thing that worries me about Dante other than being out of shape and seeming to lack a killer instinct is that he went to a friggin' basketball academy for high school. He might not really be all that "raw". He's about as raw as those Chinese players that get selected to play basketball by their government and live in a broom closet at the gym for the next 5 years.
That part worries me about his jump shot. If he has been basically studying basketball for years on years, why isn't his shot significantly better?
As far as the other stuff though, I think it's hard to improve when you are going up against inferior talent all the time and take a year off.