Juventus know that if they sack Allegri, they must put the club into hands of a new coach. There is no guarantee that a new coach will be able to sort out this crisis. Allegri has had many seasons in Juventus and he understands about the club deeply. A new coach is not familiar with many of things there. I believe Juventus will give Allegri more time and they will make decision after the World Cup that ends in December.
Not only that, with what money can you exempt this coach and take another?
This perhaps people do not think about it, it seems to them that the money is infinite, but this is not the case at all (unfortunately).
So the situation is complex