New Modifier Idea
This may not be the most practical of ideas, consodering the effort needed for new chapters, but what would happen if there was a modifier that brought in a new Killer which was much different from the others, and maybe have the trial be a quicker one with fewer gens and such, yet have the Killer more powerful?
As an example, what if the Killer was a Dalek - could not do vaults, but the attack may be able to killer a survivor in 2 shots (a bit like the giant Oni)
The mode could be used to try out new ideas and even get a bit silly, without affecting the main game and adding something which may be completely unbalanced.
Again, it probably won't be worth the effort, but thought it might be a nice place to try out new powers, new mechanics, or even just to do something silly a fun.