The AI seems a bit weird. Every other faction was obsessed with taking over a planet called "Korlam" with zero industry and 33 "kill rate" (whatever that is). I just sent ships to high industry planets that were away from front lines and gradually took over.
Are we supposed to see fleets that are in transit? They don't show up anywhere on the map. The delay of ships reaching their destinations means that, past a certain point, everything that was ever under attack is just constantly getting hit with small fleets every turn, with no real way to anticipate it. You can't really memorize every fleet you sent, but sending fleets from planets that don't get attacked to planets closer to the front line is always good, so planets inevitably end up getting taken over one turn and then flooded with extra ships you sent after the first wave.
Overall, could use some more depth. Could also skip the fifty different "planet X was attacked from planet Y" cutscenes every turn, and display it all at once on the main screen.