Not to me... I mean, i'm kinda ad libbing based upon mine own belief as it has grown up beside the DF, but to me the 'super-consciousness'(because sub or un just don't work for me) as it relates to the super ego is actually the connection between soul and body,(lots of actual theory on that one, from the halo to Taoist alchemy) So anytime the 'unconscious' element of the super ego acts out, it's actually your soul shining through, your genuine nature.(which is backed by super ego being the seat of your religious and ethical principles)
No worries, I just grabbed that from the wikipedia on the Super-ego. I think the split it is trying to capture is the Superego is your Learned Behaviors (cultural inhibitions, etc.) while you Id is your inner desires, and your Ego is the Consciousness that tries to mediate between the two. I never entirely liked that model, or rather I never really liked most of what Freud came up with; he seemed convinced that deep down we are all as horrible and unhappy as he was, the poor depressed coke-fiend. But the general idea of a balancing act between the rational and emotional does ring true with me.
As the connection in the DF is pretty precise on free will/choice basically being a byproduct of soul makes me think it's the conscious mind, the ego more closely related to the identity.(see word origins for greek name/mask ect... or just look in your writing thread on ethical characters, I put part of it in their directly quoted)
Ill be honest, Ive long been leaning toward the idea that Id-Harry has simply been Lying and is not a natural part of Harry at all; rather I think he's a more insidious and/or intelligent (Outsider) version of the Hunger Demon that WCV's are born with.
Although... perhaps this is erroneous as Hwwb4 was literally a consciousness without soul(no eye's, big give away) so perhaps the superego could be construed as the mind. Been trying to fit your Egyptian make up theory into this one btw...
Oh lord...I never actually tried to fit Outsiders into that framework too hard, mostly because I've come to think they are trans-dimensional in a way nothing we've met (save the Archangels and
maaaaybe the Mothers). Two data-points of support I have for this are Harry's description of HWWb4 being somehow cosmically
deeper than even Mab, and also the WOJ that the Outsiders are just themselves and might look different depending on what universe they are invading at the moment.
I do generally see Nemesis and other Outsider possessing spirits (like HWWB4) to be some combination of Spirit and Soul (relative to the level of Nemfection). For the level of Maeve I think Nemesis moved in and took over the place/function that would normally have been occupied by a Soul (just made of Outsider energy rather than Inside-Soul/Creation-Stuff). However that offers enough of a tether that Nemesis can push further and Dominate the Nemfected's Spirit/Intellect.