Stuff in Space is kinda hard to do without a few things. Food, Water and Sleep are all important(in the real world). I think these could be added as a sort of "hard mode".
So you're kinda hungry and the nearest seven eleven is pretty far away. What can you do? Build yourself a greenhouse! its another base piece but it can be used to make food(no seeds or micromanagement needed, just the building, powered of course). Possibly might consume canisters of water and soil for increased production. It fills up a canister of food which can last maybe a week or two and is consumed over time as it is on you.(the suit automatically feeds u as needed, it sucks it up through the canister connection and tubes it straight to your mouth)
Need something to drink too. How do u get water on a barren planet that has no bodies of water? An atmospheric condenser! It sucks hydrogen and oxygen out of the air and combines it into water which it outputs into canisters. (could make it come with a couple canisters in case u don't have that yet) Its another building, it just requires power. Or there can be another version that takes water from soil using the mineral extractor. Atmospheric condenser may also have a smaller shoulder or backpack mount version that produces a bit of water(into a canister with water in it already). The suit auto feeds the water as needed over time from the connection on the backpack. A canister of Water could last like a week also.
Middle of the night and just want the sun to come up?(single player) Why not take a snooze in the Stasis chamber? Want to wait it out until there is more food and water produced by your modules? Just wait in the stasis chamber(you don't need food while in stasis). Can also be used to speed research.(input time in stasis, or until morning buttons).(there is no actual interior cell in the stasis chamber. Its basically shaped like a curvy high tech coffin just the size u can lay down in for sleeping(maybe a glass lid if u wanna get fancy). You can tab into or out of it like entering a vehicle. It could possibly work on multi player if all the people are sleeping at once and they click sleep until morning or group stasis(host decides time). Its a permanent attachment to the base(not very mobile). Its also a good place to wait out a hostile storm.