I have to say, I find a lot to agree with in this Deadspin article, especially this:
If the concern is that football is so dangerous that we’re trying to find a way to expose players to fewer plays, why not shorten the season? Or the length of a game? Why not limit the number of off-season practices? Or why not eliminate what many believe is the most dangerous play in football, the kick-off?
Really, if more plays is a safety risk to players, then your simple answer is fewer plays. Legislating how fast an offense can play seems like a long way to go when you could simply shorten the game or the season. That would guarantee fewer plays.
Heck, not playing at all would eliminate health risks…. 😉