I am not trying to make a big deal about all of this. Actually, I suggested why can the footballs not be adjusted to conditions? Some quarterbacks have huge hands and want the footballs inflated as much as possible, and others have smaller hands and want the footballs not as highly inflated, and running backs benefit from a under inflated football. Weather conditions can affect things also and in rainy, cold weather a under inflated football might be better.
I watched the news conferences and I don't think the head coach of the Patriots had anything to do with the footballs being under-inflated. But I was not as impressed with Tom Brady. And several pro football players have stated that they can tell if a football is over or under inflated. In fact one pro football former quarterback said he paid 7500 dollars to have footballs inflated to the amount he wanted in a Super Bowl game.
I saw a ESPN show where a former quarterback was throwing footballs, over-inflated, inflated to the correct amount, and under-inflated, to a former running back, and both that former quarterback and that former running back could immediately tell which ball was over-inflated, which was inflated to the correct amount, and which was under-inflated. And the Colts linebacker who intercepted a Brady pass could immediately tell the ball was under-inflated.
I think a quarterback would immediately know if a football was noticeably under-inflated.