I have played this game for some time and found that it is missing a victory condition. And that is "Conquest". Instead of having the "Capital Victory" one you should change it to "Conquest". As it is now just losing your capital and you lose it is too easy to cheat and win. Not everything should be lost just because you lose one system. I have seen the Advent using their cannons to steal another AI Capital system with their culture cannon. And this is just soo poorly added I am afraid. A Conquest Victory condition where you have to capture all of enemies systems would be better if you ask me.
This is just my thoughts on the subject. But I hope someone else agree with me on this.
Thanks!