I would say midfield is pretty important looking at the options we have in there.
Yes, midfield is definitely important but he is more of a half 8 and a half 10. We do have Januzaj, Mata, Rooney, Ander Herrera who can play as 10. What we currently need is a replacement for Carrick/Shweini and he is definitely not that player.
To play Pogba as CM, we need a world class midfielder alongside him who can hold his position, make interceptions and pass ahead and Pogba needs to be moderately bound to his role in the sense that he can't drift away from his position often or let the game pass him by (which happens pretty often with him). To play him as a 10, we need two midfielders behind him to clean up. Add to the fact that he will be competing against 4 players we already have. I really do not see the need to get him for 120m pounds right now.