I think renderman had the "fnaf element" before FNAF itself but correct me if I'm wrong.
Whatever changes there would be it would be great if someone remastered the Renderman mod so that he doesn't do stuff like go through walls and fix the events that change difficulty/spawn rate.
The FnaF element is confusing unnerving and creepy, with scary and stupid.
Jump Scares aren't really 'scary'. They're just a shock to the senses and usually result in pissing people off.
Unnerving and creepy fear gets under your skin and really tears you apart.
your post sounds like a really formal presentation youre trying to sell to people lol
recoding this from scratch would take an excessively long time, and even working off the base of chrisbots' code it would take a considerable amount of effort. what it sounds like is you want x mod, but better, though with some more detail about your request.
you also dont really clearly state how to make this particularly better than the old one, only requesting features you want without really considering how well they'd add to the horror. removing sounds makes things feel less scary. horror is all about properly timed sounds and triggers - the old sounds may be bad and the timing may be off, but having no sounds at all is not the best solution.
I'd like rendermen (the black avatar's with the asciiTerror face.) to spawn silently, far away, and dissapear about a minute after they appear, or if the player gets too close.
I'd also like preppers ( the asciiTerror face itself as a randomly spawning image in the air.) to appear more frequenlty, but only for a second, and just out of sight.
I'd also like this to be silent, no jump scare sounds, or anything stupid like that. And some RTB-Compatible controls to determine spawn-rates and what-not.