Bills have been so good on offense this year, they have probably seen just about everything because there really hasn't been anything that has stopped them the last half of the year against some really great DC's. Fangio, Saleh, Belichick, Flores, Eberflus etc.. There is only so much you can do without risking being out of position, especially with Allen's arm able to get the ball there a lot quicker than most QB's.
Bills tend to get to the line fast and like to allow Allen to survey the defense to make changes. You will hear him yelling "Alert! Alert!" quite a bit meaning he is either changing the play or running a 2nd play called in the huddle. He also has become really good at getting the Bills into the right play and at looking off and manipulating defenders with his eyes or with shoulder shakes that simulate him throwing the ball. I wouldn't be surprised if they try that against Peters as he takes the cheese a lot...he is one of the best at getting picks, but he also has a propensity for getting burnt on double moves or pump fakes because of it.