Doc Rivers thinks it would be a good idea. Sort of like baseball or hockey where injured guys get a few starts and games in before coming back to the big league.

"I still think they should change a lot of the D-League rules," said Rivers. "I think we should be able to rehab guys in the NBDL, even if it's a veteran. If a veteran doesn't want to, that's fine. But let's say Paul Pierce is coming back and he says, 'Coach, I'd love to go play a couple games [in Maine],' then it'd be great to able to use it in that way."
Link