All these rules in the NFL are going to ruin the game.
Clean hit or not clean hit? Helmet to helmet or not helmet to helmet? Roughing the passer or not roughing the passer? Fumble or no fumble?
Put 2-3 more Ref's on the field and that will "help" with more angles to see plays and get the calls right "on the field of play." It will also help speed up the game.
The only way to make Instant Replay work is to have ALL CALLS PLAYED AT FULL SPEED.....Period...But, that will never happen.... So, just get rid of it.
I can live with a Ref missing a call over some person in the booth saying "no catch" when everyone I am watching the game with says "it's a catch."
Get rid of it and let's move on ............