Depends on where he would have went... if he went to Akron, it would have done nothing for him. Maybe an NCAA title, but nothing's too sure. He would have definitely dominated but would not have gained any maturity, as it would have been a near repeat of what he did in high school. Unless he lost, which would have prepared him for some losing, but most likely blame on teammates, and looking to a bright NBA future full of winning.
It probably would have been better for him to go to a larger, respected program where he would have to play team ball in order to win. He lacks the trait of humility. It would have been interesting to see how he would play under a respected coach, with authority, rather than the Paul Silases and such, where LeBron James is above the team. It would be nice if we were winning, and nobody would complain, but it seems like it's not really working.