What are the plans to fix Diamond IV?

tl;dr a fuckton of people were inadvertently allowed to reach Diamond/Master by spamming games at the start of the season.

Riot tried to fix this by adjusting everyone down a rank, but the adjustment stopped at Diamond IV 0 LP, with the idea that things would eventually normalize and everyone would be at their appropriate rank.

Except that's not happening. The players who shouldn't be in Diamond are now sitting at Diamond IV 0 LP and only playing their required monthly game, and not dropping out of Diamond, because it's incredibly hard to drop an entire tier.

Currently, Diamond IV contains almost 3% of the population, roughly the same amount as Platinum III.

The end result is that the system now seems to be significantly reducing LP gains in Diamond IV, because it wants to reduce the number of people there, but it's not accomplishing anything because nobody is actually dropping out of Diamond IV.

It's now possible for the system to consider your MMR 'too high' for Platinum I, but 'too low' for Diamond IV. You end up gaining 20-24 LP in Platinum I, hitting Diamond IV, and now suddenly you're gaining 14 LP and losing 22 LP.

This is causing the number of people at Diamond IV to continue to increase, and the system seems to more aggressively limit LP gains in response.

I went something like 15 wins and 2 losses from Platinum I to Diamond III promos. I was gaining 16 LP in Diamond IV, didn't play for a couple of weeks, and now I'm only gaining 14 LP despite having only won games since returning.

Something really needs to be done about this. The system isn't balancing itself out.