Agreed. There's no need to continue harping about identity politics or any such topic while we are discussing an already really inclusive game. Nobody cared that the rest of the camp is playersexual and not gay, lesbian, asexual, bisexual, and so on - but this fictional guy's opinion on open relationships must be preserved at all costs... no, thanks, but no thanks. And no, I don't think Halsin is a masterclass on inclusive writing.

I agree with what the others have summarised. Remove the odd sex pest dialogues (which don't even happen if you're solomancing him, what irony...) and the odd comments about his past in the Underdark, and so on.
Add an option to ask him to humor you by taking the relationship seriously, maybe a little bit of a different ending.
There's really not that much to add, and considering the monumental reaction from Halsin-enjoyers and Halsin-dislikers, Larian is bound to react somehow. And I don't think it's too much to ask, especially since Larian thrives on player feedback.