analog quiver
Just got out of a game with 2 other people and we won mostly because the ghosts could freely chat with the living. I feel like that might make the game a little too easy.
However I thought it might be cool if you disabled chat for ghosts but made it so they could talk to the living via Ouija Board, so they can tell them rooms to go to, and then use their smoke while in the room to guide the living.
This would not only make it a bit harder but add a more interesting mechanic the ghosts can interact with, and also have it be a little dangerous as using the Ouija Board could set off the trap for the monster.
midnight valve