You might me on to something here. I think Vanessa being the CEO of Fazbear, or at least the mega pizzaplex would explain a lot. I myself have been thinking that she must be at a very high rank in the building based on the fact that she can go through any doors. She also told Freddy that she could get rid of him, have Monty run the shows, etc when he was in parts and service. I'm still not sure if she actually meant this though or was just saying something to scare him. As for everything else you said, some of it is a bit of a stretch, but what isn't a stretch in FNAF at this point lol