Neil, if you run that experiment I’d love to hear what you think. It’s one without a control, because the running order of Rumours is so familiar that any change is just going to feel wrong.
I understand slapping it at the end, in the same way bonus tracks and alternate takes go after the end of the album proper. In a sequencing view though, that is a nightmare. Right after “Oh Daddy” and “Gold Dust Woman” is not a good place for it. “Gold Dust Woman” is the most similar song to it on the album so putting them adjacent just emphasizes that.
Let me know how your audio experiment works out!