I loved MOO2. To repeat the oft-told story, I literally was playing MOO2 in the delivery room for the birth of my first son.
However, its tactical combat was not a strength IMO. It's a strength to people who (to put this delicately) are not keen strategists maybe. But it didn't take very much effort to outfight the AI in tactical combat which debalanced the entire game.
I totally agree that tactical combat would make the game have a wider appeal. No doubt about that. But that isn't something I'm that interested in (wider appeal). I only want to do tactical combat if I can have really good AI behind it.
Space Empires V is supposed to have tactical combat so those people should, by all means, pick that up instead. But I'm a computer AI guy, I want my opponents to be making use of every feature in the game. When one considered how relatively poorly (compared to a top human player) the AI handles star bases, one can imagien the difficulty in making use of ships in tactical combat.
So it's not likely something that would show up in a GalCiv II update but it is something I hope to look at in the future because it would be a neat challenge to write computer AI for tactical combat. But it would take months to perfect.