I'm convinced that the main reason for these over-the-top rules changes to (a) increase passing, (b) minimize rolling out of the QB ("QB is a runner when out of the pocket" rules) and (c) make it more difficult for defenses to defend the pass, is Goodell is petrified where the state of the QB position is headed, and he's trying to change things to make sure traditional drop back QBs remain the "face of the league" (i.e., 6'4 white guy with a super model for a wife and great hair). Not a race thing, but I think he and his henchman feel much more comfortable marketing the league with the likes of Brady, Manning, Brees, etc., instead of Manziel, Kaepernick, etc.
The problem is the NFL has to take what colleges give, and for awhile now, the Drew Bledsoe type drop back QB is increasingly becoming a thing of the past in college. Players are just so fast and big now, coaches now want some guy with athleticism and mobility, with Luck, Newton, RG3 and Manziel being the ideal. Just look at next year's top QB prospects:
Hundley - mobile
Mariotta - mobile
Petty - mobile (don't let the skin color fool you, he had 16 rushing TDs last year)
Winston - mobile.
The only "pure drop backs" that are on my radar screen are Cook out of MSU, and Hackenburg at PSU. Nearly all the other QBs on track for the NFL or athletic mobile guys. And the past 10 years has seen a huge influx of mobile QBs (Luck, Tannehill, RG3, Wilson, Manziel, Newton, Kaep, Locker, it goes on and on)
Goodell hates this, so he has made the rules super favorable for drop back passers. It is simply stupid, and he should just let the QB position evolve instead of trying (terribly) to rig the system.