I've hated on Manu as much as anyone because I believe he is done but he doesn't see it. He goes into hero mode and ends up playing so poorly it's painful to watch. I also don't think he's worked on his game to develop anything since he came into the league. He's still relying on speed and athleticism that has been leaving him.
That said I'm not opposed to resigning him at a low number (although I do fear the spurs will overpay him). I think in a VERY limited roll he can succeed he(and pop) just need to realize he's not even the 5th best player on the team.