Aw come on Beagle....players stand around when GW has the ball because they're used to the program of Crash driving into the paint or taking a jumper without looking around. His offensive proforma is isolation; he never has passed the ball much once his nose is set on owning the ball.
If it was me...just me lol...this is what I'd do with Crash back..
Start Okafor, JRich and Felton for sure. Put Crash on the opponents best wing scorer (not a Center, big PF or PG) and tell him to get all over him on D.
Start either Nazr, Davidson, or Dudley at PF based on the opponents skill set. Don't get too rigid at PF as no one player can win the position this year. No one player is skilled enough. Against the Mavs, I would have started Dudley I suppose. Although Davidson is worth a try.
I would craft Wallace into the offense by using his isolation skills periodically in a half court set and at critical opportunities. Of course; he's always excellent on the break, no way I'd mess with that. I would not permit his skill set to diminish the uptempo offense of Felton driving and dishing to Carroll and JRich, nor stymie JRich's interior game; which I think empowers his outside game. I would try to emphasize defense first with Crash; and manage his isolation game, so that his teammates can work better with it.
Of course....THERE ARE games where Crash's isolation can just OWN his defenders. If I saw that opportunity evolve...why I'd just pull old Crash over and I'd say..."Mr. Crash, I believe you can destroy that team out there...DO IT."