Make Modifiers perm available in private matches.

Chaos Shuffle, Lights Out, etc would be a blast to play with friends or when doing personal/small tournaments.

It wouldn't need a seperate playlist and server space (afaik), just being able to click a checkbox when in the Custom Match lobby to re enable what work is already made.

Even allowing Killers to use Blight Serum year round would be fun enough imo