The bottom line is that if we do trade BBD, then we need to get back equal value or better. That does not include crazy people, Projects, or malcontents.
BBD is a solid NBA player. He proved his value in the NBA playoffs, the biggest stage in basketball. The guy can play. Sure, he has flaws in his game, but almost all players do. BBD is a great compliment to Rasheed Wallace with the second unit. Would I like it better if he was more athletic and a better rebounder? Sure, but if he has lost significant weight, then maybe he will be a better rebounder and team defender.
WOuld I like Yi? Yes. Is he as ready as BBD to contribute? Who knows, but he does have skills. Maybe we get Yi and Dooling, who is an accomplished NBA player.