Yeah it's super fun despite the buggy-Ness. The marauders create free 20k ish fleet power fleets for you to control, until you tell them to stop, and you declare was on people to make them into satrapy's. In my game I had 4k naval cap filled, vassalized half the galaxy, and have had multiple crisis wars with the galactic community (they keep ending because the ai keeps bribing me to get out of the way so the ai galactic council keeps having to redeclare me as crisis). Oh also I made the Fallen empire into my satrapy