Au Ra physiology and other lore.

[Cilia]

Stuff!

Here's the thing though: we literally have no idea how either Auri clan's society works. We know the Raen are settled, reclusive, live among the Domans, and consider themselves more closely related to the Dawn Father. The Xaela are nomads, engage in tribal warfare, and consider themselves more closely related to the Dusk Mother.

... and that's it. We know literally nothing else about Auri societies. For all we know the women are neither cavalry nor infantry, and support purely with spells (don't forget the existence of magic). Maybe they rely purely on their lithe physique for dodging and take up battle roles reliant on finesse over power. Maybe they don't even fight at all and are a rarity (like Miqo'te males, canonically). Or maybe it's the other way around.

We just don't know yet, and we won't until they get around to putting up the naming conventions and the lore behind them. Until then, I don't think it's really fair to say they should be more robust (though I agree on that point) since we don't even know how Auri societies function proper.

Also, looks like Xaela is really more popular over Raen. Lore-wise, makes more sense. That's a good thing.
I really like female Xaela's skin tones option more than Raen too. But I've the inverse opinion for males.

Personally, I prefer the black scales and horns over the white. Makes me feel more like I'm playing a fantasy race, while the white horns/scales makes them look like Midlanders with a skin condition.

But that's just my opinion.