#5 Paul Pogba and Ander Herrera need protection
With Michael Carrick set to call it quits at the end of the current season, Manchester United are in need of someone to let Paul Pogba and Ander Herrera do the things they're best at: contributing to attack.
Everytime Jose Mourinho has played Carrick and Pogba together, the side has looked formidable in attack. With the likely absence of the Englishman next season onward, the Portuguese is either going to move another midfielder behind these two or bring in someone from the outside.
Pogba is the most effective when he's going with the ball to the edge of the box – likewise with Herrera. Them staying near the half-way line is unnatural and almost uncomfortable given the number of fouls they give away trying to win the ball back.