I think Smart, Young, Bradley, along with Rondo is the Celtic future backcourt. Thornton is just here, like GW is here--necessary parts of a trade! Neither one should see time unless we somehow find ourselves in realistic contention(not happening with present roster!). Young should split time with JG at SF also.
Sully splits time with KO at PF, and Zeller splits time with KO at C, along with Fav.
IMO, Thornton, Wallace, Bass should get minutes on the second unit. It won't be enough to keep them happy. Again, we're not going to be in contention for anything, so who cares if they're happy.
Pressey, CJohnson, and JAnthony are strictly holding roster spots. Moser and Bertans are possibles. Maybe Colton Iverson, too!
If possible you get rid of Anthony, Bass, Wallace and Thornton and keep Pressey, CJ, Moser, and Bertans, or substitute CI for a third string banger!