It was an interesting game for Josh Allen and one that makes it tough to grade. He would finish the game with 359 passing yards, three total touchdowns, and one interception.
On the surface, these are pretty good numbers especially if you consider the interception that he threw probably should have been a catch. However, Darious Williams was able to pull the ball away from Stefon Diggs.
The reason the grade isn't very high is that Allen is responsible for keeping the offense on track. He struggled in this department. In addition, there were a few throws that he probably wishes he had back as he surprisingly underthrew a few passes. They would be caught but they could have been much bigger, even possible touchdowns.
It wasn't an awful game from Josh Allen by any means but there were a lot of opportunities left on the field that he couldn't capitalize on.