One of the most repeated criticisms of Allegri was that he does weird shit when he absolutely doesn’t need to. Remember Alves in advanced role in Cardiff? Barzagli matchup with Son in away tie with Spurs? Playing with 0 strikers last year against Empoli in our first loss of the season?
I prefer him being stubborn to those weird changes any day.
its why the formation doesnt really even matter. They will always go into their defensive shell and invite pressure. Allegri treats every opponent like he's playing 2014 Barca.