I'd say that the description of romance as a whole in the quadrant system is aphobic because it implicitly states that all human romance must also contain sexual attraction ("Matespritship is the closest parallel to the human concept of romance trolls have. It plays a role in the trolls' reproductive cycle, just as it does for humans."), and that the only romance to not contain sexual attraction are the "weird troll things" being auspisticism and morailagence. By itself this could be seen as an oversight but I think within the context of your post it could be seen as intentional aphobia.