This was the rare game that I look for other endings for. My first run was short, unsatisfying, and maudlin -- I felt trapped by not being able to find the right things to say, and it felt like all the answers were going to lead the same place of unresolved tension.
I am ecstatic that I backtracked and went another direction to find the different branches and two or three other endings. The experience went from one of "oh, well that was successful on its own terms" to something that gave a LOT more flexibility in the dialogue tree and opportunities for both characters to open up.
Using just one song and plumbing those depths was really strong as well.