Depends how many teams have the quality to tear through their full-backs I think. Evra's not such a good defender these days, Rafael was laughably bad for Brazil and is a constant red card danger, and Fabio has gone to QPR. They're very light.
Central midfield doesn't look as good as anyone else's either, even with Kagawa. Surprising they bought RvP instead of another midfielder or two. Are United going for a 'you score 4, we'll score 5' approach to title-winning?