Not every single video shot or idea has to be in the final version. Nobody should have believed that they could include all these things. On the other side HalloGames clearly followed a strategy to maximize the hype around their game by not being specific on anything.
Going through the list, following aspects are
imo particularly troubling:
- (space) combat/flying: no fleets or large space battles; all ships are the same; the basic gun play/flying/fighting is just way too simplistic. You can´t patch the handling and of the ship and gun-play itself, so even if you´d add different ships, fleets, better AI and all that, the combat would still suck.
- Planets: The physics are just top down as as in all other games. No bottom-up creation of a dynamic the world/universe (currently probably just not possible on this scale). You can´t patch that either, because you´d need to create a completely different game. The universe feels extremely static and looks aside all planets are the same from a mechanical point of view. No patch or additional content (e.g. base building) will really change that.
- AI/NPCs: potentially fixable, but extremely difficult; you´d need to rework the complete system.
There is a lot that could be patched/added/modded over the time. Especially crafting, building, upgrading, trading, ships, factions and weapons could all be added/improved. Still non of that will probably make a huge difference, because the fundamentals are too flawed. I said before, that it is a good sandbox, but I am not so sure anymore. It might be a good sandbox for a survival game, but space/action aspect is pretty much lost.
I think that they were overambitious and got carried-way. At some point they must have realized that they can´t implement these overly ambitious ideas, but just tried to paper over the cracks; after being extremely hyped they couldn´t walk back and promise just a “normal” game. They struggle with all the things other survival and open world (space) games struggle with. It is extremely difficult to create good games in both genres, because the core mechanics are fairly shaky.
I can´t really talk about survival games, but most games seem to be either extremely complicated (=> just for hardcore gamers) or unfinished works in progress. When it comes to 3d space games handling of the ship and fighting is almost always key and they clearly didn´t prioritize this aspect.