With the signings of Robin van Persie and Shinji Kagawa earlier this summer, United now boast a fearsome front-line that also features the likes of Javier Chicharito Hernandez, Danny Welbeck, and Wayne Rooney. No wonder then they are the team with most goals in the Premier League this season (14). It is no fluke (or bias) either that they have been awarded more penalties than any other team as well.
The only big worry for United right now is their vulnerability on the other side of the pitch. Rio Ferdinand and Patrice Evra for vital moments this season have been lethargic to say the least while Jonny Evans seems to always need the calm head of Nemanja Vidic alongside him to ever perform to the standards we all know he can. Alex Buttner and Rafael are the only United defenders who seem to have made any serious impression so far; but while both are young, talented and energetic, they have also shown the capacity to be rash and sometimes caught out.
Most people say that Man U are having a bad start to the season, but despite the team's poor displays thus far, I doubt Sir Alex sees things the same way.
They stand third in the Premier League, four points behind Chelsea and one behind Everton after six games and they lead their Champions League group with maximum points. I do expect that United will be up there competing for top honors this season given the amount of talent and the positive mentality in the group but there is a difference between competing and winning as Arsenal fans (no pun) will tell you over the last couple of years.
Right now, there is the little matter of defensive injuries plaguing them at the back but once that is resolved, United need to get their act together at the rear end. Should they do that, I don't see a limit to what they can achieve.