As long as the human element is present, and in control, and as many judgment calls are allowed, this is never going to change.
How in the hell are roughing calls on QB's and facemasks on ball carriers missed when they're supposed to have multiple refs watching the ball?
When they changed the bump n run to increase more scoring for the fringe fans to increase the ratings, they completely changed the game. Then they try and level the playing field for the D's with the challengeable PI call and how did the refs respond? They made the games worse on purpose because they didn't like it and punished coaches for using it with other calls.
I have clocked reviews in at over 5 minutes and during that time the network managed to squeeze in another commercial break with 6-7 ads and the start/stop effect on the game makes some games unwatchable.
The NFL should cringe every time they hear an announcer say "well, looks like they're going to let them play today". The DB's have to feel their way along the beginning of the games or know details about the ref crew before they know how it's going to be played. Hand fighting is allowed by some but not by others.
When they changed the bump n run, the WR's 6' and above were in the minority and now the 6'4 220lb beast is becoming more normal and how in the hell is the smaller DB to have an even playing field? This one rule change is why we saw the QB stats get jacked and the 300 yard passing game become the standard.
And you can bet every time an announcer calls out some questionable calls his network is going to hear from the league office. That's why you'll hear those guys back off so quickly when they get riled after an obvious questionable call.
What those guys do is hard and I am surprised how many times they are right about a sideline pass watching a WR's feet and hands at the same time in real time but the NFL has let the officials become too much of a factor in games.
Between the commercials and stops by them, I now go Red Zone Channel or nothing unless it's the Cowboys. It is really unwatchable to me.