After talking between ourselves, we can see that being possible and could be a really fun idea. A lot of gods in mythology have similar spheres of influence, so having one being various gods (Nathaniel/Hephaestus/Mixcoatl/etc) could really make things more interesting, and wouldn't change our storyline very much right now.

If we do go that way, we'd keep the main angel and demons as their primary forms and have the others as sort alternate forms that players could get sphere and physical inspirations from (stylized Egyptian headdresses and instruments, wings that looks more like a Mayan god, Norse influenced weapons and armor, and so on)