I would LOVE to see platonic relationships get as much content as romantic relationships. I thought a lot of the friendship moments in BG3 were deeply moving (Gale's last night alive, Karlach's goodbye on the dock, Jaheira talking about her past, etc.), and I'd like to see more! Fleshed-out platonic relationships help sell the sense that your party has grown into a cohesive group all working together, and they make the world feel more real and impactful.
