Hmm I think for my project if the Glestimals are tied to tilesets I'll simply copy over and slightly reskin and tweak some of the 'Monster Units' as they would be wild in their respected tilesets (environments) so random demons wandering about the demonic tileset, etc would be interesting, I'd probably do all this once all my factions are complete.
Anyway, back on topic, when will the GAE release support these or does it already?