If there's anything I'd like to see out of this expansion, would be something to add to the mining capabilities of a star system, more than just asteroids as a mining option. Not sure how this could work, but it's kinda wasteful to see Class 0 planets, either rocky or gaseous, not have some kind of mining outpost on them at the very least to get 'something' out of them.
I mean it's additionally wasteful to see the mining vessel Class used for only planetoids, for only a few albeit long term construction upgrades, but eventually have nothing else for them to do but take up space around my planets. (I hate decommissioning anything that took time and moolla to construct. Call me Borg like or such. =^^= )
Also, maybe something the miner vessels can do to construct some kind of solar collector arrays around Stars to make them useful as well.
Also, since I noticed them in Sins of a Solar Empire, something along a planetary improvement for Star Ladders/Orbital Cities, or something such, though it might just be more another graphical thing than much else. The same might be for 'inter system civilian traffic', like some kind of 'strings' of tiny dot like traffic' between worlds as well as around them, sorta the same like Sins had going.
All of this to both make high class star systems look more busy, (if the computer processing can handle it and all,) as well as a tic more resource efficient. I just don't fully like seeing something not used, especially in a game that has nothing but imagination behind it all. However if all this can't be done cause of coding issues and what not, I get that, just thought I'd throw in my two pence on what might help with some details that bugged me a bit.