Those of you killing him for this decision are just butt hurt he won't be playing for us next year. If you disagree with the decision then fine, leave it at that and move on.
Also, believe it or not a player's development doesn't stop when they leave college. A guy can improve just as much in a top Euro league as he can at UConn, if not more. If Hamilton doesn't get drafted that's where he'll end up.
Basketball careers are short, even for the really good players. He's going to start making good money a year early. If an extra year at UConn would have turned him into a first rounder, and if he really does have the talent and determination to get better, he'll end up in the league regardless. If not he'll make a good living overseas.