If we played a 442 with Cuadrado, it would need Asamoah/Sandro & Evra on the left for it to be balanced - no way Pjaca and Cuads are going to be wingers together in a 442:
--------------------Buffon-----------------------
Alves------Bonucci-------Chiellini-------Evra
Cuadrado----Pjanic----Marchisio----Asamoah
---------------Dybala-----Higuain-------------
The above can easily switch to 3 at the back or 433 without making any changes.
Also, a lot of formations posted here have Sandro as a left back with Alves as the right back. I can tell you now, that aint gonna happen. Allegri never played Cuads and Sandro as wing backs at the same time as he felt he needed either Lichsteiner or Evra on one side to balance it out. So there is no way he would do that when there are only 2 center backs because Alves is better going forward then he is defending.