I subscribe to this, rickyfan3.0... I think Rondo is shopped hard this offseason for all the reasons you mentioned in the OP.
However, I don't think there's anyway Memphis does that deal. What about:
Rondo, Green, Baby and the Clipper 1st rounder for Chris Paul and Ariza?
That's giving up too much, IMO.
Plus, CP3 has to want to come here to make it work, much like the Melo fiasco(s) this season.
I'm not foolish enough to think that Rondo won't be talked about this summer, but if Danny is going forward with the big 3, Rondo has to be apart of it. We need a bench with this group, so trading away all our role players for a starting PG (which honestly isn't our biggest need) doesn't make sense. If CP3 came here, and played with Allen, Garnett, Pierce & JO, how could we afford to bring in 4 other guys to back them up, and how good would they be for the price? We'd be set up just like Miami, but worse because our big 3 is not as young and athletic anymore.
Long story short, unless the big 3 is broken up, Rondo stays.