The new MMR will be a dumpster fire on so many levels.
The idea of making MMR based on individual killers AND locking killers in one they hit ready is a horrendous idea. I genuinely think this will be a massive detriment for enjoyment on BOTH SIDES. Allow me to explain please
There are a number of clear issues that arise with this. For one the exploit that allows survivors to see the killer in their lobby still exists. Allowing survivors to plan a PERFECT counter with literally nothing the killer will be able to do about it. Also removing killers ability to counterpick items will just lead to a fuckton of lobby dodges. If a trapper sees a map and can't switch killers or a wraith sees 4 flashlights, it's just gonna end in a dodge. In addition expect to see a massive spike in the amount of super sweat killers. Nurse, Freddy, Spirit. Hope you have fun against this lovely trio because why would anyone want to risk playing a niche killer knowing they can't counterpick if they get matched against some super SWF squad.
However this also will effect survivors enjoyment. One example is as I've already said expect more hyper sweaty killers in droves but also a lot of killer skill is HEAVILY transferable between killers meaning it would be incredibly easy for most killers to just switch to a killer they don't play as often and still just absolutely decimate low rank survivors with basic killer skills they have picked up on their better known killers.
All this new system will lead to is about 3 things:
1.) Probably a playerbase drop, I know a lot of people who have said they would stop playing if this went live. This means longer matchmaking times and meaning the inevitable increase in lobby dodgers even FURTHER inflating matchmaking times.
2.) Unbalanced matches. Whether it's a killer being unable to counter pick against a SWF squad that perfectly counters them or a pro M1 killer switching from Billy to Clown and not losing much in their basic skill allowing for easy matches
3.) Static killers. Get ready to see the same 3-4 killers over and over and over and over and over because why would anyone want to risk playing a more gimmicky killer with any big weakness they might match against and be unable to counterpick? It'll be Spirit, Freddy, Nurse for the most part which means one way or another games will likely end very damn fast.
I just don't see this new system working out well and I REALLY hope BHVR will reconsider this decision. The game has enough problems right now and making the gameplay even more static and sweaty is really the very last thing this game needs right now.