Yes, this season our wing play has been the main problem. But that is because Carrick is so ridiculously good now. He basically carries the midfield on his own. In the previous seasons though, there's always been an empty hole between the midfield line and the opponents sixteen-yard box, where we've lacked fluidity. You can blame our midfield for being too static etc, but at the end of the day things would be much easier if an AM was there to help them linking up. People have wanted us to play more like Barca, Dortmund, and even City or Chelsea. But that is never gonna happen with Rooney in the hole and too much width. We need our own Iniesta/Silva/Mata to do so. And now that we finally have one, it opens up new possibilities that we didn't have before.
Our classic formation is all about giving our strikers a lot of freedom. I think that is the reason for Fergie always putting so much value on strikers and stocking up on them. When you play with less width and only one actual striker, then there's a lot of pressure on the team working as a unit in the attacking third, and a lot of responsibility falls on the lone striker's shoulders. But when it works(Dortmund for instance), we get to see the most entertaining football there is. The quality doesn't have to drop either.
Fergie said in an interview that he never expected to get RVP. His early bid was more of a formality. Obviously he was gonna give it a chance, even if it was against the odds. Kagawa was definitely headed for Rooney's position. RVP might have stalled the process, but it's bound to happen in the future.