this might be too ambitious but
- allow the player to send pictures printed with a drive box, and have the scientists react to them.
- maybe add a few more entities.
- add some more stuff to do other than the normal gameplay loop (excluding the miner)
- maybe allow the kavotias to invade the base, and you would to hide in the lockers.
- allow the ability to spawn everything in the creative spawn menu.
- add more posters.
- allow the player to barricade the windows (for bad sun) and doors (for wisps).
- more argemia plushies
- more scary signals.
- allow kerfur omega to repair generators despite them not being broken, so that you don't have to wait for one to break to send kerfur out.
that's all that i can think of right now.