Runs should probably be required to show stable seed and hard mode off, because this makes spawns the same across runs, and takes the element of adaptation out of the run, and makes it less fun to me. There could be a stable seed side category, but I think it's more impressive to get a good run without stable seed on.

The vast majority of people in the community prefer stable seed in runs to allow for more precise and mechanically difficult strats instead of constant improvisation. What's more or less impressive is very opinable, but you're free to do runs without stable seed and gauge interest in the community. As for hard mode, I'm not sure what you mean? We have Normal and Hard categories so you can just pick whichever you prefer. You're always welcome to join the discord, discuss things and post your progress in any official or unofficial speedruns you decide to pursue, as that's the best way to get people interested in random seed runs if you care about the competition.