Unless an allstar or a top 5 draft pick is coming back in this coming draft, I would not trade Rondo.
If he returns to his normal health (which so far, appears very possible), he is a top 20 player in the NBA. Those guys are very hard to land. But when you have one, your team is more likely to be a desired location for another.
My ideal plan would be:
1. keep Rondo long term
2. hopefully draft a guy in this 2014 draft with top 20 potential
3. Make a run at a playoff spot next year with Rondo at the helm. If you miss the playoffs, fine. Draft a guy in the 9-16 range in 2015. Keep managing the cap.
4. then do what you can (trades, cap room) to try to lure Kevin Love, Aldridge, Brook Lopez, Hibbert, Al Horford, Joakim Noah.... or dare I say.... Kevin Durant when they approach their 2015 or 2016 free agency. In particular, I would not be surprised if Love, Aldrige, Horford and Durant will be looking for a change of scenery by then.
5. Meanwhile the C's will have developed Sully, Olynyk or Faverani into a 5th man.
It is possible that the Celtics could have a legit core in 2 or 3 years.
Back on topic, I think that the proposed trade makes Orlando a playoff team. Or at least moves them out of the top 10 in the draft. Rondo for lets say a 12th and 18th pick, isn't worth it to me.