I always thought Carey was a much better guard at Miami than he was a tackle just b/c he didn't seem quick enough to handle good pass rushers and didn't play as well in space at tackle as opposed to guard, where his run blocking skills were best utilized. That being said, this dolphins team is loaded with guards, so i doubt they move him, especially for an unproven commodity like Alabi. But crazier things have happened.
I actually prefer Hadnot at guard as well. I thought he played better there than he did at center. That's why i want Ryan Kalil so much. Nothing would make me happier than to trade down and take Joe Staley #1 and Ryan Kalil #2a, then hit up the corners(Irons, McCauley, Jackson, Hughes, etc), wrs(Craig Davis, Jason Hill) , and backup QB(Stanton, Edwards).