Genuine PoE1 long-term league idea, minimize scope creep permanently

GGG already allows us to create our own leagues and tournaments to some level, but it lacks the granularity that I believe would allow this game to run on its own for a while.

I believe they can implement unique modding capabilities and allow PoE classic players to simply play for the sake of playing. GGG can improve it in general whenever they wish. I believe they will have 10 more years of PoE1 from us if they make the following selectable or optional in every league, as well as other general suggestions:

-Make Kingsmarch the standard for all leagues.
- Added enchantments from Kingsmarch craft
- Restored 3rd/mist ascendencies or option to toggle them while creating a league
-A list of uniques and unique variations that are or aren't allowed to drop that is custom.
-mod roll weight (does it make higher tier mods more rare? lowering the rarity or customizing mod rolls in general?)
- Maintain customization options for monster strength and movement speed. 
-Reintroduce former league material. Things like scourge maps and restore scorge corruption. Maybe forge maps where we can reactivate passives on weapons? Just options.

I'm not saying everything should be selectable, and I'm not saying anybody should be allowed to contribute to creating a league like this, but if they focused their efforts on PoE1 and created something like this, we'd have entertainment for the next decade while they focused on PoE2. They may simply add a small amount of content manipulation to the league creation procedure every few months and be done with it.

To be honest, if this was accessible, 90% of people would still participate in streamer leagues. And streamers are more inclined to consent to a master league over smaller subleagues.

The idea is that if we had greater granularity in creating our own leagues and more access to old stuff, we would most likely  be able to entertain ourselves. At that time, they would be able to concentrate on PoE2 for years to come. If they want to do something random for us on POE1, all the better.

I'd prefer PoE1 have a new eco with only minor content changes and then focus on PoE2 than fight with scope creep on both projects. Just have one instance of scope creep. If PoE1 could have anything like this, PoE2 would become the primary emphasis indefinitely. There would be no more scope creep on PoE1. One final project. Granularity when creating our own leagues.