Well, in Miami, he'll never be more than a role player, even if he does find his college form. Here, if by some miracle, he got healthy, he could potentially have room to grow. And unlike Cleveland, he'd have a vet core to help him grow next year.
That said, I don't expect him to regain his old form. Still, I don't blame Danny for trying. If Oden pulls a comeback, the C's all of the sudden have a center to add to a future core of Rondo, Bradley, Green, and Sully. Not a bad place to start the rebuilding process.