Honestly, I'd prefer a lack of romance in games in general, and more funny dialogue instead of the very repetitive confession scenes especially when it just ends there. Either make fewer canon choices so you can extend relationships post marriage, or just make more platonic supports.
A real genuine and loving relationship doesn't end when you get married, well it did for my dad but, lol, that's not normally the case.
I'd support the same sex couples if there was some sort of equivalent to the child units that you could get that made sense, they obviously aren't going anywhere and having the game punish you for taking that route would make the entire experience of playing as a LGBT quite useless.
While I'm not exactly opposed to it, it shouldn't be ANYWHERE near close to the top priority in a game like this anyway.