I can't quite discern some guardian behaviors myself, even after the patch notes - do guardians spawn in, like turrets, or are they just seeded at generation? If I leave a planet on alert, will it eventually fill with superpowered death-ships? They're making me move a bit slowly, because I'm not entirely sure how they work yet and it's crimping my play style (for now - I'll get used to it, and they are pretty neat). About the only thing I can discern so far is that blowing up a Command Station releases ALL guardians (as it should), which (alongside the telestation nerfs) has obliterated my old play style (probably for the best, telestations were crazy).
Also, not sure if this is a bug or not: the current betas ARE supposed to have music and sound, right? My install doesn't. Does Unity not play nicely with other applications using sound? I usually have Winamp running for background music, but it seems no matter if I have Winamp running or not, AI War refuses to put out sound.