Maybe a ding or warning like the air and food for when your health is low. Borderless windowed would be nice. I think the buff from the random stations should last longer. Items shouldn't despawn as fast. Playing with friends in a party is awesome but it would be nice to know distance to each other on the same planet and maybe even be able to transport to them but only if they are on the surface. the buffs from the buff stones should last longer or be stronger.
A ding when your energy is low would also be nice. Maybe a visual effect too like a green circle on your avatar. When you get techs it's very easy to use up all your energy and not notice.
A locator beacon of some kind for multiplayer would be nice. A little item you carry and you can see everyone else carrying one. This would also allow players to hide by not using one. For whatever reason they may have.
Being able to erase a charactar once created, and weapons not dissapearing out of inventory and lost forever more.... these two issues must be dealt with
