Group MMR and Solo MMR
Did you consider to seperate Group MMR and Solo MMR?
Reason for this is the huge difference for playing solo to group.
Example. If you play solo at ~1700 MMR with 3 other solo survivors at ~1700 MMR against a killer with 1700 MMR, everything is balanced.
If you then play with your friends (2/3/4 man stack) you will have a huge advantage considering your average MMR against a killer about your partys average MMR.
The more extreme case. A 4 man Stack of survivors with an average of ~1700 MMR is way stronger (perks, communications, offerings etc.) then the killer.
To compensate the gap between solo and groups there should be also a seperated MMR System.
Comments
None is going to play against swf once they do it. And swf players will cry all over how bad their experience is in SoloQ because they never guilty and don't abuse anything and suddenly their skill vanished and it's all bad teammates fault.