I’m inclined to disagree, I for one don’t want to see more heterosexual romances in this game as there are plenty of those residing all over different media, and in this game as well. There are a lot of people who have had a lack of representation in media, and a heterosexual relationship for one, is not hard to come by.
Imagine how you feel, in this one game there is not a romance you can identify with. Now imagine every game was like that. Some people are happy to find just one thing in one game they might identify with, and I for one find it quite refreshing to see this relationship at the forefront and not so hidden.
TL;DR, no, I don’t think we need more Heterosexual relationships.