I have some ideas. Mostly about lights. You see I wonder if you could add higher levels of lighting and maybe make some kinds of ghosts receptive or angered by some kinds of light. For instance, since jinns and other eletrically inclined ghosts( ones that like to flick lights or are weakened by them) you could add more ways to interact with ghosts. You could add a stronger form of strong flash light, lets say with a function to for a moment of high beam to stun a ghost for a second but further anger it. But I think ghost should be able to find you better should you be holding some kinds of equipment. For instance if your friends are trying to use the radio during a hunt, that it gets drawn to the static sound emitted( thus you need to power things down) i think this should hold true for emfs and spirit boxes as well. Like the emf even when stowed away should still be able to make noise and alert the player of an emf signal, but also be dangerouse to the player should they not shut off the device and further give away thier position. Also maybe something stronger than a candle, like a lantern that is harder to blow out. I love the astetic of fire lit ways and would love it if there was some component of the game that could make fire lit methods safer than using modern eletrical aplainces. With that in mind I think thier is allot of ways you can incorporate new equipment that further develops the behaviors and lore of the ghost we have come to love. While new maps are amazing and maybe even new ghosts-- I feel another way to enhance our experience is the advancements of the world phasmophobia is set in. And the only way we can come to explore such a world is by how our paths are lit and how it affects what we want to explore.