The two biggest problems that happened with Referees was when the media influenced the league to believe that they needed "footballers" to improve "feel for the game" and changing rules every season to appease media commentators.
Bringing in Peter Louis as the Referees Coach/Boss in 1999 was the start of the downfall of the refereeing ranks. Since then, they've had Daniel Anderson, Michael Macguire, and Robert Finch all have stints as the head of the referees. They've also attempted to use ex-players as referees, fast tracking people like Luke Phillips and Henry Perenara, and as Video Referees like Bryan Norrie and Luke Patten.
As a result, the style of refereeing has changed and it won't be able to go back. I've seen very skilled referees, including Ashley Klein, Allan Shortall, etc., come through the grade, but it in order to be promoted they've completely changed their style of refereeing to appease their bosses. Needless to say, they were awful in the NRL
Then constantly bringing in rule changes at the whim of the media narrative as resulted in a fan base that blames referees non-stop for their teams short comings, and media complaining about the rules they are responsible for. Remember when obstruction was up to Referee discretion and the media (Gould) complained that it needed to be black and white? I do. The league did that and now we're back to the "they need to use common sense" approach. The same about grounding of the ball - there are constant complaints by media that the NRL chase their tail trying to appease only for the criticism to continue if not triple.
Rugby League evolved changing rules in the past only when there was a significant need because of negative play. The 20m restart for catching in goal was because teams like Canterbury were exploiting it by bombing into the ingoal. The fixed number of tackles was brought in because St George would just hold possession and grind out every game. Hell, the defensive line has moved back gradually to allow for more attacking football. These weren't every season.