This tactic is not working, it's just not worked in any matches so far. We're looking worse and worse in each successive game. Kagawa, Carrick and Giggs are about as far from a cohesive unit as can be in football.
Nani and Valencia have got no options when they get the ball, Nani is trying to do too much, Valencia is just turning around and passing it back.
RvP might as well get a deckchair for all the use he is in this formation, just like against Gala he has been completely absent.
The defence are just hoofing it because they've got no options in midfield.