I feel bad for Rondo. He passed up (likely) the chance to sign an extension that would have paid him what, $14M or so for 3 years? He (along with countless fans) far overrated his ability. Unfortunately, it all got exposed in Dallas. Rondo is a very good player, competitive, smart but he has a glaring flaw; he is a really bad shooter, and that has nothing to do with his knee. He was always a bad shooter. Doc and the big 3 did a really good job providing cover for him, so good in fact that Rondo fooled many fans and himself into thinking he was much better than he really was.
I don't think Rondo will ever play in China though, although China, Sacramento, yeah. Rondo still might be able to develop a serviceable shot. I think up until the half season in Dallas, Rondo believed he was an all star, even an MVP caliber player and didn't really think the shooting was a problem. This problem should now be very clear to him and he might have actually worked on it. A humble Rondo with an even half decent shot could be very dangerous but the same old Rondo will result in nothing but double teams on Cousins and Rondo dribbling around. I really do hope he has figured this out.