Kill Switch update: The Mastermind has been Kill Switched due to an issue with Virulent Bound. The Mastermind will be re-enabled once this issue is fixed.

http://dbd.game/killswitch

This game can't be fix

The reason is Devs trying to fix any problem the game have with perks. For example, hex undying is a perk that solve the bad placed of totems and is something killers ask for a long time or how survivors ask for perks that's help then against killer and don't need any other teammate.