I'm a little curious; was there any thought behind the meaning of the iconography for the different empires? Humanity's symbol is, of course, obvious. The Yoral symbol is likewise obviously a stylised Yoral hand. It's hard to tell, but the symbol for the Gremak Empire might be based on an abstract version of a a Gremak head's silhouette. The green protrusions from the Phidi symbol look similar enough to some of the green crystals we see on Magnate Arabo's portrait that I wonder if they're meant to be symbolic of Opil crystals. The Ashdar icon is fairly abstract, but I wonder if the three circles above it are meant to be symbolic of 'worlds' in the abstract.
You willing to share any insight, Arioch?