‘There are better ways for Allen to prepare during training camp. The Bills don’t use preseason games to install schematic changes to their offense. It’s a thin playbook without the wrinkles that Brady has added in recent months. The vanilla approach is better for evaluating and developing young players than it is to game plan for regular-season opponents. Their approach to practices, including those in Pittsford or at One Bills Drive, present enough stressful situations for quarterbacks that Allen and his teammates get more out of those workouts than they would by playing 12-15 snaps against an opponent that’s missing several key players.’