Balancing for high MMR

The devs are smart people and have designed a game that is great for newcomers and intermediate players. However, as the people who focus only on escapes and kills instead of the emblem rewards climb to higher levels, the game's fun breaks down.

1. Match times become longer
2. Games don't feel as "fun" because everyone brings the same perks and items
3. Players can't "see" their MMR, so don't have a goal or something to brag about.

Yet if you touch balance for the sake of high MMR, you naturally risk ruining the great setup you have for low and mid tier players. I feel BHR made the emblem system to cleverly encourage people to do more than just survive and escape, while those who do not care about the emblem system get shunted together. Not bad honestly. But what if there was a way to solve all of the issues while keeping the entire pool of players together?

Solution: When your MMR reaches certain levels, the game starts to reduce perk and item effectiveness.

What do I mean?

For example, lets say you hit some arbitrary MMR level of 1500. As a survivor, self healing with a med-kit or self heal now takes 1 second longer. Once you hit 1600 MMR, it takes 2 second's longer. As a killer, ruin's effective gen regression decreases by 2% every 100 MMR you gain.

Ok, but why though?

1. This does not affect low to mid level tier players fun and enjoyment.
2. As you get better, the game forces you to focus more on your own skill rather than "stat stick" perks.
3. This allows the devs to balance tweak at higher levels in small ways. Perhaps if gen regression perks are still too powerful, they decrease the benefit faster than say hex the third seal. Perhaps some perks don't get any reduction in effectiveness at all.
4. Perk variety will likely change as you climb MMR. This keeps the game exciting, and has people talking about new strategies as you climb.
5. Penalties become both a way that you know about your MMR, and a "brag". "I'm so good that my Pop Goes the Weasel only does 10% gen regression!" Youtube video title: "I self care for an entire minute and still win." For those who love to challenge themselves and feel like their skill matters, this is great.
6. People more naturally fall into their skill level. Those who can only win with items and strong perks will quickly hit their limit of MMR as those items and perks decrease in effectiveness. Those that are extremely skilled will rise, and likely enjoy the challenge.
7. After some initial balancing, you can likely -> start mixing high and low MMR players again. <- This will help with queue times, and allow higher MMR's to still be part of the lower MMR community.

With this, I think you solve all three major problems with high MMR play, without harming the rest of the game's community. What do you think?