I would absolutely love if they gave us an ending where they showed Tav and SH on their farm, with Scratch, the owlbear and various other animals, and her parents if you saved them. Maybe they could do something with the githyanki egg too (if you take it) because it would be hilarious, yet heartwarming seeing SH raise a gith child, considering how she was before lol Perhaps they also have a baby already or on the way. Either way, it would be such a beautiful family moment. As far as I'm aware, SH never says she wants anything more than this. So she should get what she truly wants and deserves. Us getting to see it would make it so much more meaningful.
It wouldn't be enough for me to buy their future games, but this would be better than nothing.
That would truly force a very heteronormative view with core family values upon the player. My Tav is a woman, where did this baby come from? (I am not sure I even want to know!) And not everyone sees a Jane Austen fantasy as their dream relationship. Yes, Shadowheart expresses this as a future she would like, but I find her character to be very open minded and receptive to Tav's wishes as well. So I don't think she would force them into a certain lifestyle. I think it's best to leave certain things unknown so the player can paint their own picture of their future. Sure you could put a bunch of flags and checks that only leads to this ending under very specific conditions, but that seems like a lot of work and their track record with implementing flags and checks properly isn't exactly stellar.
I am not accusing you of any bigotry or anything, I don't think you meant it with any sort of malice. It just shows how these norms are so prevalent and can unintentionally exclude minorities and other people.