I am also interested in reviving / helping manage this category. I've been doing quite a bit of speedrunning on it in the Any% non-DLC and Any% Coop categories but the rules need to be updated for me to submit my runs.

For example it looks like Act 7 is no longer DLC. Though it could be said that the up-to-Act-6 Satan rule still applies since odds are the game is going to keep expanding.