Wellmade characters have a tendency to develop into directions you did not intended them to go when you concepted them first. Could also happen here.
You surely did not read some of my earlier posts on this topic, right?
Because then you would know that I very much acknowledge how Sophia Lundgren is as a person. To paraphrase myself:
Opening the door to her heart is a very different trail than those of Mina, Hana, Felicia, Rosi or Veronika, even Kat´s.
Sophia is a genius-level nerd, completely amoral, eccentric, cold, calculating and if what we know about her is mostly true, then Sophia also comes in very handy when the lead starts to fly.
You and her can click to a certain extend and you can end the current version of PC on good terms with her, if played for that. The seed is sown.
Pursuing her and gaining entrance to her heart would be a very interesting path to take!
Not only for the main story but also on the "sidelines". Just imagine a repeat of Viktoria´s surprise visit not with Hana opening the door, but Sophia having stayed the night.
It would be a major shock for the MC´s mom that you are going for a woman like Sophia, since the good Doc IS different with a major D.
You are quite mistaken when you lump her together with Kat. Kat is into PC to sate her sadism, getting off on it. For Sophia sadism is not even on the radar anywhere, feelings have nothing to do with her being in the club.
And another hint that Sophia is not quite as bad as other important characters in the game, she states that Chuck is scary. When a person as amoral and calculating as Dr. Lundgren tells you about another person that he/she is scary, you should damn well better listen. That is actually a real life tipp also.
My personal theory for Sophia and Abel is that on the "goodish" Edwin paths they are either in deep cover for an acronym governmental organisation or on their own "crusade", while on the "badish" Edwin paths they are their own brand of a... like Edwin´s bosses.
You in addition overestimate how likely it is Sophia being the "honey trap" for Edwin. She is great at many things, but charm will never be one of it. She even unnerves Kat! A person like her is not honey trap material for most persons.
Sophia and Edwin in the bar area are two cardcarrying members of the nerd squad meeting each other.