I really don't understand why, at least in some games, we don't play Bruno deeper next to Pogba with a DM behind, instead of Bruno playing as a high up number 10. Bruno is more than capable of playing deeper and sharies responsibilities for defence, possession, and shape.
I know Ole is seemingly set on the 4231/4213 or whatever you want to call it, and there are some advantages of course but downsides too. Even if this were to remain Ole's preferred formation, at least using the 4123/4141 on occassion seems a no brainer, whether for certain games or even just for certain periods during games. It would allow us to control games more, it would offer greater protection, it would relieve our wide forwards of some defensive responsibility, and it would see Pogba getting into more advanced positions. The gung-ho, direct approach with 4 players almost permenantly in advanced, central positions can be destructive at times but it has drawbacks, and it seems to be no coincidence that almost all other top teams don't play with a number 10 at the moment.