I would have left him in the D-League all year.
I like Bradley a lot, but if the Cs are serious about turning him into a combo guard, he needs PT at that spot, and he's way too horrendous at PG to develop at that in the NBA.
He does not see the game like a PG at all, so combo guard is the most we can hope for.
But man, that kid (1) can get his shot off at will, NBA or anywhere else, (2) is a force of nature on defense, and absolutely can defend two NBA positions, and(3) has elite NBA athleticism.
I'd be tempted to accept that he's a dynamic undersized 2, not entirely disakin to a more athletic Ben Gordon with a streakier shot but who defends. As a 2, he can play with the varsity starting next season, if there is one.
But if they want to turn him into a combo guard, the D-League is absolutely the place for him to make his mistakes. That'll be an uphill battle, though, IMHO.