We have made a statement concerning this, both on the in-game news and on our Support website, if you are concerned in anyway or notice suspicious activity then please contact Support. https://support.deadbydaylight.com/hc/en-us/requests/new
We're investigating an issue with matchmaking that is currently affecting all platforms and causing a "cannot connect to host" error. Thank you and stay tuned for more info!
The numbers aka rank do not matter for the MMR. Your SBM rating is based on how you perform, not the number you have in your rank. It is possible now that a rank might face now a rank 20, as it calculates differently than based on rank.
You are responsible for your own account, if someone is using your account and they do something that can trigger a ban, then yes the account is banned.
The issue I see with this, if Stealth were buffed then games would last a really long time because that P3 Claudette will be hiding constantly - imagine that with 4 players?!
It also seems to be that more people enjoy chases in this game, they tend to be the most fun and interactive part of the game.