I think his influence is especially significant in a game like the one this weekend.
This was a game where Allison and the central defenders probably touched the ball more than in most other matches. Man City were heavily focused on pressing from the front and closing off gaps to both the central midfield and our fullbacks. The ball found itself near Allison's foot a lot during the game with Man City players either trying to press him directly or closing the passing channels.
It was therefore quite telling that he not only found a teammate 99% of the time but also found teammates on a run or in positions that allowed them to switch to the front foot and attack. It relieves tremendous amounts of pressure and finds the team in an unnatural shape that can be exploited. And as the game goes along, it also demoralizes and saps the energy of the opposing team.
Allison does so many things well all the time but in a game like yesterday, he has got that extra set of skills that makes him truly, truly world-class, in my opinion.