Scott Cawthon and Steelwool come to you to help them reboot FNAF from the beginning. This reboot universe would be separate from the current timeline and you're allowed to change, alter or delete various things within reason. However, Scott and Steelwool have a few rules:
1: William Afton remains the central antagonist and is still a murderous Mad scientist.
2: Charlotte and the souls possessing the other Animatronics remain the same.
3: Animatronic designs must remain close to those used by Scott and Steelwool.
4: The bites of 83' and 87' are canonical events that cannot be changed.
5: No including any fanverse fan games, or fan content, except as a small "Ha ha" Easter egg.
So how would you reboot the series? What changes, what stays the same? What parts of the lore do you keep, what gets reworked and what gets thrown out entirely?