Well, I don't know where did you put Biedrins, but that guy has at least one pretty good skill - rebounding. Last season he was a better per 36 rebounder than Favors and Kanter. And he is also mobile and plays some decent defense. There is some non-negligible chance that the change of the scenery can pick up his spirit and make him a decent bench player. Rush/Burks are both solid choices as bench players, and Williams could even be a borderline starter. The only questionmarks are Lucas, Evans and Gobert, but they do have athleticism and size going for them.
per36 numbers dont hold weight when you average 9 minutes per game.