Ronners, I think you probably know but, they have massive screens for all the fans to see the play backs not just the officials. Okay, the fan at the game cannot hear what the Ref may be saying however, it's far better conducted in the way they handle things. I feel the body cam on the Ref is a massive deterrent for dissent because all the viewing public could hear how much of nob a player may be.
Can you imagine watching a live football game at home without any commentators interrupting what the Ref is actually saying, so you get the full picture so to speak?
Moreover, imagine Lineker and the MOTD panel being out of a job as they wouldn't be needed to explain how a match went.