The squad that won the league will be almost a couple of years older now. Rio and Vidic, when fit, played a big part. They're gone. Evra has more miles on the clock now. Likewise Carrick, who looked shaky last season. Cleverley looks to have taken a step back. We relied heavily on RvP every other week to dig us out. I don't know, it's not nearly as bad as it's being made out, but I think the current squad is substantially weaker than back then. For me Fellaini adds almost nothing and Mata, brilliant player though he is, hasn't nailed down a position yet.
The way I'd put it, that team was brilliantly resilient and overperformed. I don't see that being possible with this squad. A few really good players would perk the rest up and also bring back a bit of the fear factor. As things stand teams know we're vulnerable.