I think you have to distinguish clearly between the romantic and the voyeuristic path. I at least find both interesting and I think I'm not alone.Cuck Dylan ''FOR ME'' absolutely makes no sense. When I saw this route i immediately felt ''fuck this.. i ain't doing this shit''. If liam was cuck in this game i would've liked it. There's no way a son (with Oedipus.. lol) would enjoy watching another dude getting a bite of his own mother. It takes the fun out of the game for me . Also i want to develope a pure relationship between Dylan/sophia, don't want dark side in it.
However, what really doesn't fit is dylan as a cuckold, because he seems to agree to the situations and even try to causes the events. That doesn't sound like a cuck to me, but more like the voyeur.
Anyway, it could be a lot of fun, because there is a lot of entanglements possible. It also fits well with all the people who have a voyeur kink (including me).