I wouldn't mind having Stack around, but he's a 10th man on this squad, maybe 10 MPG. They're big on Daniels, who fills a couple of needs for this team. Marquis will be getting 20-25 MPG, Eddie House probably the same, that doesn't leave a lot of extra playing time for someone like Stack if we assume that Rondo, Ray, and Paul are all averaging about 32MPG.
But, a savvy veteran player who can put the ball in the hole? If he's healthy - and that's still a question mark - can't see how bringing him in would be a bad thing. Depends, I suppose, on whether they see enough from Hudson to want to keep him around for a year.