On the contrary "tactic" should be superbly balanced and still may have exploits which the clever human can use to beat the artifical idiot. For example I still remember one epic victory in Imperium Galactica 2 when I defended the planet with a single antigrav tank cleverly placed on the top of the hill which my enemy's tracked wehickes couldn't climb. But they were trying to! For game mechanics was built in such a way that planet could not be captured while there was still resistance. So I was shooting and shooting them blowing them all up and the computer did never consider retreat for to retreat of 50 tanks before just one enemy was way beyond it's comprehension.
BTW, u can remember, that it were hard to win against enemies armadas(Kra'hens were really strong), but it was interesting, and, sometimes, funny. U could made your own armies and fleets, your own units and that was greatful. Every unit was really specific and you could use it in your way. At real, it wasn't "tactic" battle, it was deep, strategical battle and every decision in tactic, researching and building were significant. Now I playing in GalCiv III, and all races had declared war on me(just coz I am Yor). They had defeating my fleets with their overpowered ships with nice shields and lasers, and I couldn't give to my fleet some orders like "get them in a pincers" or "Use {Yors' curse} rockets, why u are still using beams?!". If I could command my bases and fleets by myself, I could defeat those enemy fleets. So, what I did? Yes, I made a ship with shields and rockets, then overcome my enemies. SO STRATEGICAL!
Everyone is telling me, that it is "deep" and "global" strategy. But war is as important as science, colony managment and diplomacy. Look at the Imperium Galactica 2 - nice game, all included. And yeah, it is global space strategy. Total War is global strategy. In Endless Space u can only use some cards, but them affects on battle result. GalCiv III - "no-no-no, it is global strategy, we would destroy it, if we made controlable battles". Why player can dictate his will to scientists, governors, diplomates and even engineers, but not to officers. As it seems for me, developers are just too lazy. As a fan of this seria I'm disappointed.