He doesn't need to be an amazing point guard. In fact I think Boston is a great place for him if he manages to learn the game.
We have Doc. He can draw up a lot of plays that decrease Bradley's need to make decisions.
We have three great playmakers D-West, the Truth and Rondo, the former two capable of doing so in complementary positions and with Rondo, Bradley can play SG.
A decent jumpshot, better handles and some PG skills.