For the years to come, when Rondo comes back, Bradley will be playing off the ball. I think he is one of the best cutters in the NBA as well - he times them so perfectly and has a great feel of when to do it. He's brilliant, and Rondo/KG in the post hit him almost always perfectly.
Offensively, I don't think he should be exerting so much energy. Drives every so often are nice, but as long as he can continue to cut as well as he has been for the past couple of years, honing his spot up shooting would be the only key aspect to his offensive game. I can see a 15+ ppg average out of Bradley in the future.