I'm trying to think of another video game that explores this dynamic. I'm coming up at a loss. Has it been explored in other media? Of course. But I don't remember it being explored in video games before and I tend to pick and play pretty much any game that has gay content.
Regarding the idea that there is more to be told than just this story? Of course. I agree. And that's why I pointed out specifically that the fact that only 1 out of 5 gay characters in Bioware games have this story is important. If it became the go-to gay story, it would be disappointing. But having it show up once is not a problem at all. Juhani? She has an implied female lover, but her sexuality doesn't play a role in her story. Steve? He lost his husband, but his sexuality doesn't play a role in his story. Samantha? She has a crush on EDI but her sexuality doesn't play a role in her story. Sera? Her sexuality is barely mentioned. I'm not seeing a problem with having one gay character in the history of a company's games that speaks to a common experience for gay people.
Is it a common story? Yeah, it is. Does that mean that it should never be told again? Absolutely not. Especially since it's something that gay people deal with all the time still. The fact that people can relate to it is what makes it a compelling story. Maybe not for you, but certainly for others. Look, I think that stories that play with themes of religion and faith are played out, but I recognize that it's probably because I don't relate to them. I don't think there's a problem with them being included, even if they were to heavily favor one perspective.
I suppose that in this case, it's a matter of what you're more focused on, this story being told in this medium or this story being told in general. Me, this story has been something I see as almost 'the default' story for gay characters, regardless of the medium, which is why I'm disappointed, why I wish that there would have been a different story for Dorian. I want OTHER stories, because this is the story that I so commonly get when I'm looking at media with gay characters. To me, Dorian's story doesn't feel like it's got much if anything that significantly differentiates it from a dozen other stories like it. Maybe this isn't something that has been addressed in this medium before, but to me, it's the most common story I've seen for gay characters, which makes it disappointing for me that this is the story he has, the story for the first gay male companion.
I'm also just generally disappointed that, in giving us a character dubbed 'the Redeemer,' his storyline shows nothing but reasons that make it feel like there can be no redemption for Tevinter. If this is supposed to be his title, his purpose, all I see in his personal quest is a reason to say that Tevinter is beyond redemption, that as a society, it's better off being burnt to the ground, rather than trying to salvage something. If he's going to live up to the title of 'the Redeemer,' the title given to him in all the build up to Inquisition's release, I would expect to see THAT as the heart of his personal quest, trying to show something about Tevinter that's worth redeeming, rather than being given this story that, regardless of if you want to call the events within it cliche or moving, has at the heart of it yet ANOTHER reason to hate Tevinter, as this is the society that spawned this attitude, that gave Dorian the cause to leave it behind.