I do think Bradley's defensive intensity on the other team's offense is very disruptive and, along with Pierce and KG rounding into form, has contributed mightily to our uptick in D and our winning percentage. So I agree with you there.
However, I don't think it means we trade Rondo necessarily.
But I do think Rondo is lazy on defense. He could be every bit as disruptive as Bradely, if not moreso, if he was willing to extend his defensive effort.
To be hoenst, Bradley has now proven he can at least spell Rondo (with Pierce in the game with him) for a good 15-20 minutes a night.
Therefore, Rondo should feel 100% free to majorly increase his defensive intensity on the ball when he comes back.
There is no reason why, between Rondo and Bradley, we could not put just sick pressure on opposing team's point guards for a full 48 every night. And it is what should happen.
Bradely beings much more hunger at the position because he is trying to prove himself and also because it's who he is defensively.
Rondo should take a cue from the young guy and step it up. We can rest him anytime he needs it.
Rondo! Pick up the Defensive intensity and get less "cute" and more "nasty" on the offensive end - we'll be good to go.