@namomo there a place to ask for those thing - the forum development.
https://ulmf.org/forums/forum-development.19/
There's even a thread there asking for that function to be back :
https://ulmf.org/threads/ignore-thread-function.11781/
Otherwise, when re reading what I said earlier, I may well not have express myself clearly (sorry).
When I was talking about more enforcing of the rule, I think it could be be separated in two main point :
1) daily life of the forum, it would be better to have members remind peoples and have admin enforce rule (when needed with the appropriate action) rather than having flaming thread. Nothing is more depressing than getting on the forum after a good night sleep / hard day work and see a thread with 2 flaming answers and 354 neg rep for someone who didn't follow the rule without one person kindly explaining the mistake.
I mean, who never ever made a mistake ? (of course, mistake and plain trolling / willful breaking of rule are different things).
2)
IF There is some change in the forum with new sections, change of where to post... many peoples WILL post in the wrong place due to habit and / or not having read the new rules. This will need a period of gentle enforcing of the rule to Shepherd the members into the new way without resorting to flaming by other member and heavy sanction.
As for potential new tag... Haven't really though about it yet. But the first thing will be to incite thread maker to update the tag (uncompleted -> full game, WIP -> finish....).
If I think 2s about the main used section...
Translation... We may add something like "Partial / Full - abandoned / dead" to avoid too much necroing. We can also have one like "Tool" to easily found translation tool thread... maybe ?
For the Hentai game, maybe some more different tag to make search by genre since the forum isn't having only rpg maker game.
There quite the number of side scroller / plateformer so why not a tag for them.
Maybe transform RPG Maker in RPG or add another one for wolf RPG ( and there also Unity based rpg appearing so that would mean Unity rpg for tag...).
There some few thread about illusion's and other big game (micomisomi, a few ADV like RANCE...), put them all in the Other / full game or imagine new tag ?
If we make some change (or event not) we may think about "recommendation", "request","discussion" tag to easily sort through the many thread.
There also more and more thread about game WIP by their own dev, most using patreon. Should we keep what we have avaiable or come up with thing like "patreon WIP", "patreon Full" kind of tag ?
Sorry, it's not really well made for a list. More a kind of list of direction of reflection about it.