If you'd like some gameplay mechanic ideas. For one of the rooms, there could be a power box that, if an animatronic gets to, could shut off your cameras.
another mechanic could also be a different watch mechanic, similar to fnaf4. Where the longer you look away, the more aggresive it becomes until it eventually attacks you, unless you look behind you and watch it till it resets.
I think these could help shake up gameplay, though I'll definitely be interested to see what you can come up with.