With every team on that list should their starting QB go down it's over. I'm not saying there is something that could be done to counter that, I don't think there is... but I think it's very VERY bad for the game.
I DO think that something could be done to better prepare backups to be more prepared should that eventuality occur, even though I offer no 'fix' in this reply.
Am I the only one that feels like in today's game "Luck" is the primary factor? Stay healthy, win.. lose ONE guy and wait until next year.