That's a very acute analysis. It has the great merit to establish links between facts that seemed random at first (introduction of mythological characters in various albums for example)and reveal their possible connections showing how they could in reality all be pieces of a much broader design (again with the image of the jigsaw). At the moment being, it's still hard to see if your speculations are on the right track or if we are in presence of a case of JW's "I do it because I can and it's fun", but there's one thing I'm sure of: JW's writing is perfectly able to reach to this level of complexity.

And on an aside, have you seen the info about Btvs n° 27, I particularly like this part : "Buffy learns that suppressing her demon side could be the biggest risk of all ..." Her demon side, yes. It's nice to see it spelt out so clearly, because you know, Btvs is such a clear cut and simple verse with evil black hats on one side and goody good white hats bla bla. By the way I'm waiting for your meta for Lie to me ( You alluded to it I think on Gabrielleabelle's LJ)