Awesome, glad to hear you're working on this! Since someone who can actually make add-ons is doing it I guess I'll go ahead and lock my topic.
I hosted a prop hunt game for several hours so I have a few suggestions if you haven't done them already-
I think the props team should maybe be lowered to half scale or something, so that when they disguise themselves they can fit into smaller areas. At normal scale you can barely fit into any good hiding places
Also if you're going to use a bigger map like ACM city, the rounds should probably have at least 10 minutes each, the emitter should definitely still be on and you should allow hunters to shoot without losing health. There's just too many hiding places to play fairly otherwise. But losing health while shooting should still be an option, it could be an rtb pref maybe, set to decrease health everytime something is hit by a weapon. That could be used when there's a smaller or more empty map being used
Also what worked well for me was having an empty room that the hunters wait in before the round starts, once the 30s timer ran out they were allowed to teleport into the arena and a Chat msg was sent to everybody saying that the hunters were released.