They're also weak on fullbacks. Cuadrado is one year older, Danilo is just decent, De Sciglio is their own Darmian and Sandro is done at the top level.
But they have strengthened A LOT in midfield and attack. Especially if they also sign Paredes and Depay. Even if Pogba doesn't work for them, signing Paredes would allow Allegri to use Locatelli higher on the pitch where he's best at. Paredes, Locatelli, Pogba, Zakaria, McKennie is a good and deep midfield. As for the attack, they're loaded as fuck. Di Maria, Chiesa, Vlahovic, Depay, Kostic, Kean. Very good quality and depth.