I think it would be useful for their to be a broader acceptable range of relatoinships displayed on TV. Though that was happening (e.g., Sister Wives, Big Love, The Family). Not always in a light that I would prefer, however.
I would prefer overall more realistic portrayals of love and life. Kind of like how war movies took a dramatic turn in realism after we emerged fromthe trauma of the Vietnam war - John Wayne to Saving Private Ryan (or even Band of Brothers) is a very marked experience for the viewer. That kind of realistic portrayal of the balance of ideal, reality, pressures, and whatever. Included in that would be a broader range of how people actually manage through the difficulties of relationships, various forms of openness would be a part of that view to be sure.