It may simply be that I prefer the more melancholic interpretation, lol.

I think Mitchell's enjambment is sesnational --"Where there is poetry, / it is Orpheus singing" -- except that I can't quite forgive him for "Isn't it enough if sometimes he can stay /
with us a few days longer than a rose?"

I see that on paper it's mostly iambic, but I can't say it out loud any way that doesn't jangle.