I don't know what you are talking about, Bonn. I evaluate a player and make my opinion on it.
Zack is and has always been a black hole on offense. He is exactly what we don't need in this system, especially with Lin taking the charge. We already have to deal with Melo's isos. The guy will rebound, and thats it. If you have a guy that brings you that quality already, why bring the bad side of his play.
Lee is a great rebounder but as bad defensively as Amar'e and even Zack. He will score you those garbage points that are nice, but that's about it.
Now, you have a young guy that plays defense better than those three, can score those garbage points, rebounds and shoots the three. What is there to hate? He isn't this good because we drafter him, so that takes your silly argument away, but because hehas already proved it with playing time. Did you miss his games?
The point is, no need to look in past failures when you have a viable option already in the roster.