as you point out, the most vocal guys (Rooney, Ferdinand, Vidic and Evra) have been sorted out. Giggs and Dutch Skunk remain the biggest problem. one is going to be part of United for life and the other is their 2nd highest paid player, so some choices will have to be made.
i would like to see them stick with him and work with him to have a solid transfer window in the summer. managers are well compensated for the risk their job has, but i do think that owners are too quick on the trigger these days