I had suspected that with Diggs around, he was dictating where the ball had to go. The other team would triple Diggs on 3rd down and Allen would jam the ball in there anyway and he would drop it or get defended because EVERYONE knew it was going there and the Bills punt and I'm cursing at the screen about "well don't throw it THERE." It was different from when Allen wasn't yes established and/or he was making the grabs, but it just got too predictable. Being less rote as to where the defense needs to key in critical situations - I wouldn't be at all surprised if overall efficiency of the Bills offense improves for the absence of Diggs in that instance.