It will be great signing for them. He can have an impact instantly, he will want to prove his price also play a lot after Mourinho kept him on bench. Also wants to be in WC squad for that he needs to play a lot and play well.
With Rooney/RVP coming back soon, I think they will just do enough to get 4th place. Cant really say Pool/Spurs/Everton can be that good to take 4th. They all will drop a lot of points in coming weeks, Pool-Everton,Spurs-City, Liverpool-Arsenal, Tottenham-Everton in next 3 rounds...
United somewhat easier run with Cardiff home, Stoke away, Fulham home in next 3 league games. If they just do 7 points from 9 they will close most of the gap they have to 4th...
(Bahhh, all 3 games vs ex-United players/coaches, they will help out Moyes...)