Everyone’s suggestions so far have got me dreaming hard!
I have a small contribution - Submersibles! - Perhaps a new upgrade/tech blueprint (series-of OR questline to obtain) to enable the NOMAD to switch/spin/reverse its hover-gear into ‘aquatic-mode’ or something like that.
NOTE: I really don’t care if we are like beta-testers for this… Nothing in life is made truly perfect, its humanities nature to try improving things as we go. Personally I see years and years left for the NMS simulation. Exciting to think how it will be 10 years from now… VR goes without saying! … I hope to play when old & grey and if I may beyond the grave!