This is spot on. I've given this as a reason why we probably keep seeing the likes of Valencia in the team.
A lot of us want to see us with an interchanging, fluid attack with Januzaj, Mata, Rooney and RVP, but we don't really have an ideal midfield to support that right now. Look at City and Chelsea for example, they've got extremely energetic midfielder sat in behind their front men. That's what we need. Hell, Mourinho even decided that Mata was too much of a luxury for his system.
It is going to take time and money to get where we seemingly want to be. I'm sure it'll be worth it in the end if we can just get those players in to make it work.