I would say tactical combat in GalCiv II is a horrible horrible idea, however that's just fanatical fanboyism talking. The thing is, I'm really just neutral on it to begin with, it wouldn't effect my enjoyment either way.
The thing is, we DO determine the outcome of battles, we determine the outcome of each and every battle by designing, building, gathering, and maneuvering fleets into (or away from) battles where they can either achieve victory or accomplish an objective. We do in a sense take control in tactical battle, because we SEE how effective our ships are, plus we get to see the ships we decorated maneuver in combat without the distraction of controlling them. Then, we take the information from that battle and it effects the next battle we choose to enter. (edit: even if you don't =choose= the next battle, it still teaches you to mount better engines

which will effect the war from then on)
If they could instantly institute controllable combat (turn-based I would hope but that's besides the point), and make it 100% bug-free, and it wouldn't take time away from making the rest of the game better, then okay fine I wouldn't mind it. But that just isn't how things are. The reason all the 'fanboys' are so defensive is they don't want to crash 10% more often or wait three months longer for a given feature just so people can have a completely pointless "MoO Too" feature.