I know this might not be within the scope of the base game but I and many others thought we'd get to interact with the girls in some way other than them popping into a room for a bit while doing an idle animation of some kind before leaving or messing with something in the building. Such as talking to get to know them better, hugging/kissing, and intimacy safely of course (meaning you don't die from it).
I understand that In Heat Honeymoon will fulfill this over time but I do like the idea of being able to interact with them in other ways in the base game. If this is something you don't feel fits or won't add as Honeymoon exists that's fine. I just think it would add a bit of something extra to make it more unique from other Fnaf style games where the Animatronics do basically the same, popping into rooms for a bit while trying to kill you.
I'll see about leaving suggestions in another post after playing 0.73 abit.