More survival options: Food
Add food as an extra survival element. You could have greenhouses or climate controlled rooms. Convert ice into water to irrigate crops or grow hydroponically. You would have to buy different seeds at stations but you would start with potatoes as default. It could also be added to contracts. Adding water as a resource could also make gravel useful as it could be combined to make concrete blocks and expand building options. Due to not being able to have water in game if you lose or drop water on a planet it just soaks into the ground and if it happens in space it turns into ice.