- Things to come back for day to day- I love hanging out in the Subnautica world but wish there was something ongoing that I could do from day to day. Just logging in doesn't do it for me.
- Hubs- Large buildings or areas for players to see and interact with each other, take care of research, organize inventory, purchase and sell things, pick up missions, etc.
- Repopulation Programs- Populate areas with fish, animals and …
Remote automation guages- I think it'd be cool to see different gauges of the player built habitats on the PDA. For example- Growth size of plants, power of habitat, amount of biomass in the bioreactor, amount of water bottles that can be collected…
-Level Editor- Edit the map and share it with others. They can visit the map and experience what you've built. Maybe even explore together in coop or multiplay. Like the Farcry editor.