For some strange reason that game reminds me of starsector :p
Looks nice!
lol, Starsector has definitely had a pretty big influence on how I'm portraying things visually, but gameplay-wise, they have exceptionally little in common. Starsector is a big, open-world sandbox RPG, while Disunity (my game) is strictly a single-layer RTS, somewhat more akin to the Homeworld series.
Here's a picture of the system map:
Each of those little areas you see is its own battlespace, centered on an object of interest (Usually will be planets, or any other populated entity). Fleets can move around within them freely, but if they need to get somewhere else, they'll have to do a short FTL jump. Not sure if anyone remembers, but in the last iteration of my Obsidian Void mod, I changed Starsector's hyperspace system into something pretty similar. There was no real hyperspace travel, just direct jumps to other planets. This sort of mirrors that to an extent. Actually, come to think of it, it's sort of similar to Sins of a Solar Empire, except without needing any silly "links" between planets.