One rule that the NFL could imply so that a controversy like this won't happen again is that they a ref or a trusted official could check ball pressure and weight before they are brought on. But a problemwith this is that it would slow down game time, and fans love a action packed face off would be bored or angry that a stoppage time is added on every time a substitute ball is brought on. So instead of checking it right when they need it is that the team with ball position would present the selected ball that they will send in as soon as they gain position and refs will check it as the game goes on meaning no stoppage time and no deflated balls.