If Luck was truly a system QB, he'd be sucking this year in a system that just changed. Even with a coaching change and a lot of players that left due to that (as usually happens) he stuck around and is just as good under new coaching as he was previously. I expected his stock to drop off this year as most senior QB's do, especially under new systems, but he is still #1. That says something about how good he is at the game.