I have no problems with witnessing silly remarks being proclaimed by the NPCs of the game (like the ancients logs etc.), just as long as it is clear that this is not an actual knowledge of what the Shivans (or any other race for that matter) really are and what they are up to, but rather how some people interpreted their nature.
That is why I was in disagreement with Darius take on the matter. FS1 made some indirect remarks about theories of shivans, but they actually remained black boxes throughout the original series. AoA just takes it (almost!) literally. Battuta (I think) has told me (us) that these dialogs happening in AoA between shivans and vishnans, etc., were visions channeled to the player in a "mysterious way", and that the message was simplified, bla bla bla bla, meaning that even what we see on AoA isn't exactly literal, but rather how lieutenant Bei was able to understand it.
Still the sight of seeing a dialog between these creatures (and in a very simplistic grammatical way) really undermines Shivan's identity as a species incapable of making nothing more than simple sentences with basic ideas about destruction and construction (well that's my take on the matter).
I agree with you they are utterly alien, and that's the way, imo, they should be fictionized. The worst thing it could happen is if they somehow aligned themselves with some kind of metaphysical theological crap about how they exist in order to "judge" the "cosmic harmony", how they are here to maintain the "balance", or any other silly simplistic holistical bull****.
No, I'd *love* them to be unpredictable. Devious. Smart. Without any (observed) rules. All chaos. And we (the humanzods) would be left with our own paranoias creating these arbitrary categories where we could fit them inside and pretend to understand them. That's the kind of antagonist I like: an unforgiving uncategorizable formidable force.