I think we need a tidy midfielder. Someone like Scholes or Fabregas. I think Pogba might become a very good midfielder, he is not currently based on Euros, but with his long legs I don't think he will ever be considered a real tidy player with the ball. Our best midfielder with the ball is Carrick, a 35 year old and that could be a problem.
The other worry I have is while Pogba is strong and can cover a large area, I don't think he is quick over 10 yards or less. In other words the spine of our team is sorely lacking in quickness: Carrick, Schneiderlein, Fellaini, Pogba, Herrera, Rooney and Ibra. Teams like Liverpool, with quick players all over, will have a decided advantage.