This does give me an idea though. What happens when so-dominant and Fe PoLR collide? Does a person simply handle the social realm in a very logical fashion? Would such a person worry about group atmosphere?

I wonder if there's a rough correlation between these. Seems that if anything is happening here, it would be
Fi ~ sx
Fe ~ so

Another thought, which I think might actually be the case, is that the socionic type causes the manifestation of instinct. Instinctual types are pretty much considered inborn, but perhaps these are just results of one's Sociotype. Not to say that everyone would necessarily type as the same thing, but rather that the changeable part, the part induced by life experience, is the only part that varies.