I don't think the criticism of the Burke rendering is anything to do with her not singing it as if it were a folksong and as if she was a folksinger. Leonard Cohen isn't exactly a folk singer, and this is hardly a folksong.

It's about whether she did justice to the song.   And I'd doubt if that was a matter which too many of those voting were concerned about - it was surely about who they wanted to see more of in the future.