People are being a little short-sighted. If we are talking equal contracts (and I know we aren't), I take Rondo all day. I get that he is having a difficult time adjusting to Dallas, but before he was dealt he was putting up nearly triple double averages. Maybe I am 'old-school' in not caring if my PG is the best scorer in the world, but even still, Rondo is clearly the better of the two and has the track record to prove it.
If he wanted to come back to Boston this off-season for $12M a year, I wouldn't hesitate to find a new destination for Thomas, even if it was just a pure salary dump.