I say sell Cuadrado and switch to 4-3-2-1 because we don't have enough money to buy so many wingers for 4-2-3-1. Plus, with 4-3-2-1 I think we'd get more out of Dybala, Pjaca and even Schick.
Then I'd invest hard for a quality midfielder. In that case we could buy Fabinho and play him next to Pjanic and Marchisio for example.
Also, I wouldn't mind ONE BIT if we actually sell Bonucci and it's a good thing he met with Sabatini yesterday lol. In that case EVERYTHING changes.