The worst Man U team in a while is running away with the league. City is average, Chelsea sucks, Arsenal sucks, Liverpool sucks, Spurs is nothing special. Everton and I guess Man U are the only team performing to an average or above standard.
They don't have good wingers the center of the midfield is average and the defense is probably the worst of the Fergie era which spans a pretty long time. I'll give them credit for finding ways to get wins but I also attribute it to how poor the rest of the league is.