Andray Blatche sucks like a black hole. He's no good. At all. Here's the scouting report on him:
Andray Blatche is the softest player in the NBA. He thinks he's a ballerina with all his spins and pirouettes. His go-to move is the up-and-under reverse layup. Every player in the league knows he's going to do it, but Blatche keeps doing it, time after time. When he heads to the rim, he's going under and reversing, almost guaranteed. And since he never goes hard to the rim, he's easy to block.
When he gets the ball, he looks only to score. He's a ball-stopper of the first order. He loves to fade away on jumpers. He's afraid of contact, and simply hates to dunk, because he might get hit.
On defense, he's completely useless. He won't body up anyone. He doesn't show and pick and rolls, simply laying back and letting the offensive player do whatever he wants. He floats around on the interior, giving a half-hearted effort at best. He gets lost constantly, watching the action rather than his assigned man. He's ridiculously easy to drive around, as his poor lateral movement and lack of desire mean he's always a step late.
In short, Blatche is a terrible player. When he's on the court, it helps the other team. It's a good thing for them that Flip loves him so dearly, and rarely sits him.