Don't know if anyone else has tried this one. It's another one I keep meaning to dive back into...
https://store.steampowered.com/app/894630/Final_Theory/The devs call
Final Theory a 4x "lite" game, which I'd say is a pretty accurate description: Empire management is both simple and streamlined, with the focus being on fleet movement and tactical combat (turn-based). Games tend to be fast-paced, partially because there is no real diplomacy to speak of. Battles, ship building, and fleet movement are all pretty interesting IMO.
The devs have released one DLC so far (The Royal Navy), and have just
announced they're working on three more (the Syndicate, Colonial, and Federal Navies). I'm not sure it's worth paying that much just for new ship-sets (though granted, they do come with their own abilities & features), but either way it's nice to see a 4x that is both doing something a bit different, and apparently doing well enough to making multiple DLC's.