Rumour has it that the space stations are due for an overhaul at some point. Let's see how that statement of mine ages. 😄
More variety on the planets would also be welcome. More biomes, more biomes per planet, more variety in flora and fauna, add rivers, jungles and desserts.
As for buildings, flesh out the settlements. They seem to be the start of something, but what? The outposts could use a few more models, I agree, maybe with a few more procgen inside.
So many ideas. So much potential. NMS is super broad. It needs depth, IMO.