Hickson is supposedly the player they wouldn't trade for Amare (although I always doubted that a bit). That earns him a spot in the "we overvalue our prospects" Hall of Fame, right next to Nic Batum and Rodrigue Beausbois. All have the potential to be good (or very good) players, but none has superstar talent, in my mind.
I'm pretty sour on both players, so Casspi + protected #1 for Hickson makes sense, just due to the premium put on size.