I like it, but the mid game is... a bit dull. I can either fight pointless wars against my immediate neighbors or watch techs unlock.
Mind you, a lot of that is choosing hyperlanes, so I'm literally boxed in by other empires (though I grew well before that point, and eventually had enough of peace and fought to a hyperlane to the next arm over, which was completely empty barring a fallen empire further down the line. So I expanded far more than I really should have been able to without resistance).
However at 10 hours and a century or so in... I'm lacking on things to do. I've fought one small war and one medium war successfully, and just pulled the trigger on another one, basically for want of anything else to do. It will net me one (1) system (44 warscore), and 1 each for my two allies (1 liberation for 18, 1 conquest for 25, and nothing else would fit), if I bother to fight beyond the minimum necessary. But frankly I'm not terribly inclined to do that, because mostly at this point combat seems to be about chase scenes, emergency FTL and more chasing.
Wars at this stage are pretty meaningless (because I can take so little), and tricky with allies, because the warscore adds up so absurdly- I should be vassalizing, but don't have the war score room to do so and still give my allies something so they'll vote yes. It is extra galling because the game's 'suggested demands' rack up to 180 something warscore and are invalid. [And the only reason I use them is to find out what the most distant empire (non-adjacent to every enemy) will actually accept, sadly he won't go in for free.]
Everything else is... in hand Sectors have enough resources, my numbers look good (and I have no way to increase them beyond wait for growth anyway), and at this point, I'm waiting for techs to unlock, or something big to happen.
I even cuddled up to the Holy Fallen Empire's borders (and forced them inwards, to the point that they lost control of an uninhabited system), built planets in the same system as their holy worlds (but not on the holy worlds) and built research and mining satellites in orbit of the holy worlds, just to see if something would happen. It didn't. Without colonizing the actual holy worlds (which is not what their description says, it says system) they don't care, and their opinion didn't twitch at all. [+25 because I am also fanatic spiritualist]
Weirdest thing of the game: I can make psionic armies [psionic army is a rare tech] out of my conquered slave race's former robots. I... don't know how psionic robot armies work.