To me, half of the appeal of Paul isn't just that he could potentially be a cornerstone of the future, I also think that he could catapult us to #18 this year.
It really has nothing to do with how much Rondo has done for the Big Three or vice versa, it really just boils down to this question: how much better would the Celtics have to be if teams couldn't cheat off of Rondo?
It'd be like Shaq replacing Perkins last year, but even more dramatic. Many of us said last year that Shaq would find success because unlike Perk who couldn't finish easy opportunities around the basket, Shaq would succeed because he could take advantage of the easy looks.
Same with Paul, but even more dramatically so. If teams cheat off of Paul, he'll destroy them from the outside and if teams stay home on him, Paul, Ray, and KG will be able to be that much more effective.
And we already know what happens when you put shooters around the Big Three. That's why Doc went with lineups of House, Posey, and the Big Three for big stretches in the '08 title run. Only now the C's would have the shooting and the playmaking, making them quite formidable.
So medical issues and contract issues all throw together, I'd still make the trade.