I meant to add in that I don't see New York throwing away Hill AND Robinson just to get rid of Jeffries's contract - for Curry, absolutely, but not just Jeffries.
On the flip side, I'm not sure it's such a slam dunk for the Celtics. Factoring in the money, Jeffries is not an upgrade over Scalabrine at all. You can't factor $3 million in savings at the end to make Hill better than Davis, Hill and Allen, but ignore the fact that we'd have to pay Jeffries around $14.5 million over the next two years v. only $3.4 for Scal. Plus, while Jeffries showed flashes in the past, he has been pretty bad the past few years, not really much better than Scal.
Robinson is a much better all around player than House is, and is younger, no question. That said, I might actually prefer House on our team. We're already lacking on bench shooting, so losing House would be very tough, and Robinson doesn't help there. And you have the same defensive problems. Robinson, however, gives you another guy who can handle the ball and he's a young guy with tons of ability. While I see him as a guy who will fill it up on bad teams throughout his career, not a contributor to a champion, I can see that he's an upgrade over House. But on this team, not as much.
As for the last part, I think Davis has much more ability to help the Celtics THIS year than Hill or Williams and I'm not convinced Hill has a huge ceiling. It's not like a Rondo-Hill combo would be a championship core down the road. I get that Rondo-Davis isn't either, but all I'm saying is the future doesn't make the present sacrifice worth it. If we were not worried about competing this year, then yes, it's fine, but going from Davis to Hill is a downgrade.