Sounds like this has been figured out, when others start running it let them know to bring it up for discussion in Discord as that is the most effective way for everyone to discuss these matters in a civil manner. There have been other categories added before so this is pretty standard. The mods have not ruled it out and there is no need to make a commotion about it every other week.
Why you want so hard people to accept a new category ? Just run the way you want and that's it, nobody is gonna stop you. The thing is, you want more to be on a leaderboard than running the game. I've already did an new game+ run, did all level with the menuing and stuff, i had fun but i'm no gonna cry for a new category just because i want it. Atleast run the game and share it to people, it will be easier for you if you make people want to run the category.
Recently a vote on the MDSR Discord has lead to the timing rules for Individual Levels and Master Levels being changed. In the upcoming week or so, we will be cleaning up the IL and ML leaderboards to match with the new timing rules, Old runs that do not comply with these rules or where the video su
