Re-hash on things I would like to see in game or in GalCiv 3.

Carriers!!!....I loved the tactical aspects of combat in the Homeworld Series when using the fighters, corvettes, bombers etc. i would like to see ships like the Pegasus or Galactica launching Vipers to intercept incoming bombers etc.

Retreat...Faster and smaller ships shoould be able to break off an engagment that is going badly or would enable hit and run tactics.

Ship capture / Space Marines....The ability to board and fight to disable or capture an enemy ship would be nice.

Damage control and system damage. Ships should lose systems as they take damage and thus should not be able to fight full strength until their demise. Likewise ships could do damage control in battle. A wounded ship could retreat to the back of a battle and be protected by other fleet ships.

Hanger bays to repair small ships on carrier ships or starbases.

Habitable moons around uninhabitable planets...ie a warm Europa around an inhospitable Jupiter.

Fleet Admirals/Captains that gain experience. ie Civ4 famous persons.

My 2 cents worth