I think bringing up sexuality breaks the purpose of being diverse, if that makes sense. Ruins the attempted normalcy.
I don't care who's banging who, so long as they aren't preachy about it. They got that way with Krem and Iron Bull, but they didn't force my character to agree with what they said, so I didn't care really.
Aside from that I think they handled it well. Dorian's thing is that he's a unique look into the Tevinter, not that he's gay, and when it finally came up, the story was genuinely sad. Iron Bull was... lol, special. But it makes sense that he's... friendly. With everyone, being a Qunari spy and all.
You have to fit in and it's already hard for him to with other races, being a big mean looking Qunari. And none of that sentence was a sexual innuendo, lol. I just mean that he's not exactly inconspicuous, so making friends is important.
Anyway, they didn't get too preachy with it, and that's all I really ask.