Resetting the leaderboards would suck for sure, but if you come with solid rule changes, that might be a way to go, however that should happen only if something big happens to the game itself (e.g. remaster happen and the client get merged with the new one, or some big patch appears for the old client along with the remaster). RTA vs IGT - IGT is usually a way to go, but that's to decide when you create a game's category, I don't think we need more of them. I think @Bender_ really nailed it about the IGT stuff. I think it's easier for people to run RTA when it comes to setting the recording etc., on RTA you don't even need Livesplit or anything.

About that -ns stuff - it saves time, but also you might be unaware of some things during the game (e.g. far/offscreen drops that you usually don't see, but hear). I personally do some of my runs offstream and I just listen to music/talk on Discord during them, and if I the new rule would be "runs have to be recorded with audio", that would be problematic for me to set, and would invalidate some runs too (if the leaderboard stays the same).

I think that's more of a casual opinion/point of view about that stuff. That's interesting topic and discussion, can't wait to see the outcome.