Antonio Valencia is the least exciting footballer in the Premier League. xD Even Ben Mee and Wes Moore are more exciting than Valencia. He is actually the most one footed footballer on the planet and only has one thing that he does. Every single time he gets the ball, I guarantee you he will go to the right of the defender and try to go round the outside. If he isn't tackled at this point (rare, most defences have figured him out now) and manages to get past the left back, he'll put in a low drilled cross that won't clear the first man. Every single time.
Next United match you watch, look out for that!
I think a midfield trio of Herrera, Blind and Fellaini would be incredible. I don't know what the Rooney in midfield business is all about. Well, I do, it's to accommodate him, RVP and Falcao. Never thought I'd say this but Van Gaal needs to grow a pair xD Need to drop at least one of those players. 4-3-3 with the midfield I named and front three of Di Maria and then either Falcao and Rooney or Rooney and Januzaj/Young would be killer. That or, if you want to go more attacking, you could drop Fellaini and put either Rooney or Mata in the #10 role. Van Gaal doesn't seem to be a fan of poor old Herrera though.