Vuc with good D would be a borderline All-Star. The guy has proven he can score 17-18 per on pretty solid efficiency and pass very well for a big. The problem is he's not quite a good enough scorer to make up for being one of the worst defensive bigs in the league (total inability to defend PnR). So he's a negative overall. Plus he plays the most important defensive position, which makes his poor defense even more of a problem. If he were a guard, with the same offensive positives and defensive negatives he would basically be Fournier, a guy you can get away with starting by hiding him on D. But you can't hide a bad defensive 5 in the modern NBA; so Vuc, thus, should not be a starter in the league. Give him just good defense, and it changes all the math on him. Instead of being a good offensive player and terrible defender, he's then a guy who gives you a bit of everything. A good defensive Vuc is basically Horford, but probably a better rebounder.