The best way to fix the whole bunker/ref pressure mess in my opinion is to only allow them say 3 replays of an incident, and they can only watch them at normal speed, without an super zoom facility. If they can’t see an obvious error from those views, it goes with the refs decision. That way, the bunker is only called upon for the absolute howler (as was originally intended). The game isn’t played in slow motion and under a microscope/super zoom, so it shouldn’t be reffed that way either.
Would also get rid of all this bollocks about pressure on the neck and staying down - The penalties for pressure on neck were originally for the classic crusher where the attacker deliberately jumps down on their head, pushing it into chest, not to protect players who choose to turn their back into the defenders to try grab a few extra yards and then flip to their front for a quick ptb. Nobody ever goes off injured with a sore neck, but they’re all laying down for a penalty. Sack off the bunker intervention unless it’s obviously serious foul play that has been missed by the ref (like the Mitchell one)