I apsolutely love Big Baby and I can't think of him being somewhere else. That dude gets it done, and right now he knows his role, and plays it to perfection.
If we're rebuilding how important is the your backup PF/C? (he's shown that he is a liability when starting)
Very important considering you need backups on your team.
Ainge has proven able to find productive bench players.
You keep Davis into the rebuilding, it becomes a situation like Ainge had when he got here. One star and a collection of nice bench players. Ainge had to blow it up around Pierce and rebuild.
I rather see the team naturally blow up and then rebuild. Right now, that is set up.
In 2012, Rondo and Pierce are the only ones on the book. Green will be available for a sign and trade along with 2 first round picks that year. The only other possible assets would likely be guys on rookie deals, easily moved as cap filler or actual trade value.
Any deal Davis signs after this season has to fit into one of two categories:
1) one year deal
2) Easily tradeable.