I’m inclined to examine what we already have & where else those features could be implemented.
Command Ship (freighter) docking bay tweaks & the Space Station alterations from NEXT may give a hint to possible update components, with maybe further enhanced features added.
New NPC venders, giving the opportunity for a bit of buying & selling of owned starships would be nice. Maybe even ship sales between players…?
Custom player-owned space station bases in uncharted systems might be a possible direction. With such large scale building now available, a playerbuilt space station seems feasible.
Maybe even hub-citadels for the multiplayers…?
As @sheralmyst mentioned above, ship customization has been big on the community wish-list. Exocraft customising was introduced in NEXT so ship customising would be a logical next step. Maybe not all components, but colour & ‘bolt-ons’ maybe.
Perhaps abandoned systems might get more debris, like war ravaged derelict freighters & frigates floating in space to investigate.
With us now being able to interact with frigates & the recent appearance of derelict space stations, it would seem feasible that derelict frigates & freighters (in space) might be possible.
With the introduction of more vibrant ocean environments, I wonder if deep, dark ocean exploration might be more of a thing?
Caves seem underutilized too.
There are some confusing unanswered questions such as the ring structure ‘Boundary Failures’ & the reasoning behind the exotic planets where they are?
Why are sentinels so protective of certain things & places yet the corrupt sentinels get no back-up at all?
What is the deal with the Calcishrooms & crashed satellites both displaying the same flashing red symbols or warning?
I could go on & on but these are a few of my thoughts on what the next update might entail.