We'll see. The future of that frontline is Monroe and Drummond. Josh Smith is playing out of position and when you consider how much he chucks up ill advised 3's, that could really backfire on them.
Also, you need a good PG to help maximize the talents of those young bigs. That isn't Jennings. He's another chucker who will take away from the development of the bigs.
OTOH, Rondo is one of the top 5 PG's in the game who is regularly among the league's top assist guys. Throw in a true SF like Wallace and I still make that deal.