So, I said this:
It does strike me that Demon might serve as an interesting template for variations on the same theme, of spirits in mortal bodies. You could semi-easily do something more generic by assuming a kind of animist setting, and allowing characters to host animal, plant, rock, river, sky and so on spirits. This would immediately tackle the issue that most of the demonic powers aren't very demonic. Some of the others could be discarded, or turned into generic Lores accessible to anyone - although personally I'd want to drop or pare-and-merge some of them for being either incoherent or rubbish. Again, that seems like it would fit well with the idea of Generic Supernatural Power that spirits might be able to bestow on top of their specific spheres of power.
Money, meet mouth.
