Signing Zaza wouldn't upset me.
I'd take either Hansborough for size, or Ellington for possible stardom. I think Ellington's going to be a big late round bargain for someone.
Plus, if I'm Ainge, I've got six must-retains: The starters, and resign Davis. Everyone else is available, although I'd take another look at Walker. But I wouldn't let Walker break down a good deal, either.