Regarding ship building, i see that very likely to come but i am suprised it has not happened yet. All ships had a redesign years ago now. Then Fighters had an upgrade in appearance, then about 1-2 years later, explorer ships had an upgrade. But what is more of a tell, is the ship scraping UI. It has an exact model of your ship,(besides color) taken apart into its individual pieces. Then there are customisations for all exocrafts and the datamined customisation UI for ships that was found years ago but nothing came of it(could be that it was for exocraft customisation that did eventually release)
Ship cutomisation would be great, but i’d love larger ships that seat multiple people or an option for piloting a larger ship(about 2-3 times larger) with at least a small walkable interior that can be customised with a couch and house a single small pet.