Yes some of the hits would be illegal, mainly the d-backs and receivers. It seems that college is not being effected as much as the pro's though. The hit on Lacy might have been illegal.
I see a lot of hit today where the tackler keeps his head in the same spot but the offensive man moves his helmet down to take the hit, not sure how to stop that except give them a better helmet.
At some point this is going to die out and either you play or you don't. I didn't believe so at first, but when the press started in on NASCAR, people that drive in bunches at 195mph, you have to think maybe there's not a whole lot you can do about it other than don't play, or quit the game if it becomes a problem.