Mourinho needs to stop being so stubborn and adjust the formation to suit Pogba. Maybe he simply doesn't think that Herrera or McTominay are up to playing alongside Matic and so he's asking Pogba to do that role until we can get somebody else in in the summer, but really Mourinho should have seen this coming and got someone last summer or in January. As I've said before, he needs to stick to the formation United played against Everton away, that was Pogba's best game of the season by a mile and in that game United played 4-3-3 (or a variation of that). Sanchez wants to play in the number ten role behind Lukaku, so you could even do a 4-2-3-1 as follows:
Lukaku
Pogba--Sanchez--Martial
Matic--Herrera
Shaw--Rojo--Jones--Valencia
De Gea
Spurs model of playing two DMs is something we need to copy, I think it's the way to get the best out of our attacking players and still stay defensively sound.