That's not what they told us when they had the best offense in football over a 20 year period. Odds are, given the choice, Bill would prefer to run the complex and intricate system he always ran. The fact he's gone away from that even while praising his QB's maturation tells me he likely doesn't trust the coaching. If Mac has evolved and has a much better grasp of concepts and scheme (and I 100% believe he does), why dumb it down considering most of the starters from last year are returning? Aside from Parker and Strange, who's a newcomer that should be expected to contribute a lot and would benefit from a simplified offense? Sure, it makes it so guys can react and play faster, but it obviously has other downsides, otherwise they would've made this change years ago.