So, I've had these ideas in my head for a while - astroneer is kinda running out of content, and I've done loads of stuff in a small amount of time. So, my suggestions are:
A change to how tethers look - What about making tethers just wires that lie on the ground? I guess it would kinda look cool, and I think It'll be better compared to tethers right now, with those small poles.
Bigger spaceships that look more spaceshipy - do I need to explain this? New spaceships which are bigger, better, faster, and more stronk!
A change to the system in astroneer - I've found out that if I explore a lot, like a huge amount, my fps starts getting shakey. That is just a no-no, since this game is supposed to be fun all the way along! What about unloading areas that you've explored from the system when you're away or something, and reloading all of it when you came back? I might be totally wrong here in a way, but yeah.
Spaceships that crash in real time - How cool would that be? Watching a spaceship crash right in front of you!
Space Stations- I want a space station. Why not? Loads of new mechanics would have to be introduced, but thats just more fun for us!
Resource distribution - why not make this a little more random? A resource could be rare in a section of the planet, but in the next section, it could be abundant.
Upgrades for the spacesuit - I find later on that I need more inventory space in my suit, so it would be nice to have an ability to upgrade.
Automated machines - I know this was there in the start, but what about some simple machines to do stuff? Like, a machine that continously makes hydrazine using the fuel condenser?
I guess thats it!