Rondo has a ton of heart, is a great distributor, has great instincts, and has very good court vision.
That said, he's not as good as Chris Paul. Paul would instantly elevate our championship chances next year. He may be the one semi-realistic player that we can acquire that would extend our current window. (Other guys, including of course Howard, would, but I don't think we can get them, especially not for next season.)
There are very few players I'd trade Rondo for, but Chris Paul is clearly one of them.