so keep them fast by implementing the whole WR corp, starters and backups (to some degree at least) into the game plan,
Its the norm for a player to try and play hard enough to get the start, then try to stay on the field to keep it, just goes with the territory.
Under the circumstances, considering the amount of plays the Bills run on Offense at such a fast pace, I believe it would benefit the team to implement more WR's into the game plan. Especially considering the amount of running involved at the WR position.