(the newer versions of Exerelin and UsS already have similar systems at work)
Not surprising at all - it's really a pretty natural approach, once you start generating fleets through code.
Strangely enough, the part of the blog post that I was most excited about was the night time city lights for planets. It adds so much more "feeling" to things, its not even funny. I actually tried to make my own hacked version by spawning another planet (set as a star) on top of the planet I wanted to draw lights on. Ended up not including it when it became apparent that I couldn't sync up the two planet's rotation haha... the whole "cities in the middle of lakes thing" wasn't really a good look (not to mention it played havoc with hyperspace travel/jump points).
Hah, nice, especially considering what you had to work with

One thing to note about it is the lights layer uses a light in the opposite direction from the light coming from the star, so lights showing up in weird places on the planet surface isn't an issue - you only see them on the dark side.
On the topic of "adding feeling," I think it would be cool to have the ability to add more useless junk floating through space and give them descriptions (comets, derelict hulks, alien artifacts, etc.). One of my absolute favorite things so far from both a modding perspective and a gameplay perspective is just flying around the universe and sightseeing around all the different planets/lore people have made. It would also be pretty cool to have a codex page for factions, planets, and star systems.
I think this is in the patch notes somewhere, but in any case, custom entities will be possible in the next release. Don't know if you caught a ring of orbital junk around Sindia in the second screenshot, but that's how those are implemented. (Playing around with the idea of using orbital junk - in addition to the hab lights - to signify habitated planets.)
Comm relays are also implemented as "custom entities", and so are some of the stations. You can add tags to say what type of thing it is, for example a "station" tag or a "comm_relay" tag are checked for in various places to allow the right set of player interactions.
I know the next update is huge, but the fact that you are now adding content gives me hope that a release is imminent-ish. I don't want to make you commit to any deadlines or anything, but do you have a feeling as to when the next update will come out? Is it weeks, a month, multiple months?
You're right re: content being indicative of where in the release cycle things are, but, you know... soon(tm)
