We had 2 major problems in there.
Biggest one was wasting Morata on the left wing, the guy is completely out of position and out of the game. Pereyra is much better at floating from that position to AM.
But the other one is very important as well. Sturaro can't contribute to team build up. He's amazing at closing spaces and defending, but the build up is not there. It leaves too much on Pogba, and as he's been showing, he can't handle it.
Sturaro was very very important in the 2nd half against City, but I'd like to see a more tecnhical player in there, like Hernanes or mainly Pereyra, who can support the attack.