Sadly it will never happen, this gamemode has been extremely 4K-centric, to the point where since they let 4K mains "fix" the pp system in a way that hurts others more than them. Fun fact: the "pp cut in half" event from a while back is NOT a flat 50% nerf to everything as many think, but three separate changes.
1) Fuckery with strain calculation which becomes more significant at star ratings that aren't a thing on 4K besides DT(and even then it's rare), vibro/manip(unranked) and charts made specifically with star rating in mind(mostly unranked). However, those star ratings happen naturally on pure, non-gimmick charts past a certain difficulty level on higher keycounts.
2) Big buff to 960k+ scores, which incentivises playing "easy except a single spike" charts. These are popular in 4K meta, but unpopular and frowned upon in other keycounts' metas, to the point where almost no-one will want to rank it, even if it's justified by the music.
3) A flat 20% nerf to everything(specifically mania scaling multiplier going from 1.1 to 0.88).
The result is that not only 4K mains lost less pp, but Asreilly actually GAINED pp.
Let's take a hypothetical 900k score on a hypothetical OD8 chart with 2000 objects.
At 3 stars, You'd get 58.75pp pre-nerf, but now you get 69.63pp(119% of pre-nerf pp).
At 4 stars, You'd get 141.63pp pre-nerf, but now you get 135.21pp(96% of pre-nerf pp).
At 5 stars, You'd get 279.42pp pre-nerf, but now you get 224.98pp(81% of pre-nerf pp).
At 6 stars, You'd get 486.08pp pre-nerf, but now you get 340.09pp(70% of pre-nerf pp).
At 7 stars, You'd get 775.56pp pre-nerf, but now you get 481.51pp(62% of pre-nerf pp).
At 8 stars, You'd get 1161.83pp pre-nerf, but now you get 650.10pp(56% of pre-nerf pp).
At 9 stars, You'd get 1658.83pp pre-nerf, but now you get 846.60pp(51% of pre-nerf pp).
Screenshot this because it might get deleted. If my account goes too(wouldn't matter in my case since I play offline, see my signature or my earlier post in this subforum), consider making a private server(because none of the existing ones seem to rank 10k except for vibro).