Not sure why he wouldnt have made changes, didnt catch the second half yesterday due to being at work. He maybe should have but to say that Allegri, overall, is somehow change averse or inflexible is simply not true at all.
Why I am saying this is because he has been like that this season. I have always supported Allegri but this season he has been stubborn in his approach. We cross around 80 times per match and get nothing out of them yet we keep on doing it.
I'm afraid he will not develop that much from here. It's just too much of a gamble to buy unproven player and make him grow, we kinda need to buy already accomplished guys. Pogbas are not lying on every corner.