I don't know, I think you kinda have to chalk the unrealistic headgear up to magic and divinity to some degree. They're clearly not *meant* to be realistic, so instead if you'd like, you could make some reason for it, eg. it helps channel the geomantic spirits or whatever. I'm kinda digging it. They look more like religious iconography than actual people, and I kinda feel like it fits. It's obviously a matter of taste though.
Overall maybe the most enticing faction in AoS I've seen so far.
I do think it's a tad weird that the faction dedicated to *light* is all about *geo*mantic spirits, ie. earth spirits. It's thematically... odd.