I don't know what you could have asked more of an IF/OF than Hall's provided this year. He's done everything but play catcher, been a gamer, gave his best effort, and was pretty effective. The power is nice, too.
If his demands are reasonable, I very much look at Hall as a guy the Sox should re-sign. Could he regress, sure, but he's a guy who can play a lot of roles and I think he should be held onto as a quality 25th man.