Well the only real factor i didn't like of galactic civ 2 was the fact that I couldn't control my ships in combat and pull off sneaky tricks. It was just all done by math --- boo math.
I miss being able to board, shoot down incoming missiles, disable ships. All which were present in that great game MOO2 which I'm not saying should be cloned but def. should be looked at.
Another option of course is to completely copy G-civ 2 and just make a fleet and let it go then just do math when two fleets meet but I guess that would somewhat negate the "thrill" of micromanagement.
a copy would not be as enjoyable, i like the way the game is set up, but i do think that in large battles that the rest of the world goes away whilist u raze the otherside into spacedust
i did like the idea of ship decay though.