actually this kinda does explain why the free roam o the arcade version is so annoying without cheats if you actually want to do stuff and roam to take things. If the map was bigger then it would justify why the characters don't stay as long in closed rooms 'looking around' the room before starting to walk around again. But, as is, it makes sense the supposedly 'randomly roaming' animatronics for some reason seem like actively looking for you rather than roaming on their own, resulting in the diner area ALWAYS having one to three animatronics in there... if they were made for a bigger map it would make sense to create a sense of actual looming threat to the player, where you can feel 'relatively safe' in an area as long as the girls are away but the question is 'for how long until they make the round again to your area?', and the more girls around the more tense you'd become because there might not be anyone around in sight but what if one comes soon and while escaping that one you encounter the other in a wrong turn? that's fun and engaging!... but in this map? doesn't work because there is no 'questioning' if there are any around, you KNOW there are, and you know the moment you step into the dining area 9 times out of 10 there will be at least 1 animatronic there because there are not that many areas the animatronics can roam and they stay there for long... so it's a constantly moving set of characters in a small area... you are BOUND to encounter them because they are programmed to survey a much much bigger area but are limited.
a way to fix them would be by making them spending more time in each of their areas once they get there, like moving around the kitchen or game area, stopping, moving around that specific room (beyond entering, standing there, and leaving) but that would require a different programming of the characters... a programming that wouldn't be the case in the larger areas they are made for and would require these characters to 'know' when they enter a new area which means personalized programing of the AI.
Pretty interesting stuff to see that this might be a reason why the nights in the arcade mode feel so erratic and crowded.