I don't think the Skinny Love cover is that bad. There's something so untouchable about that Bon Iver album that no cover will come close, but this is a solid attempt and most Gaslight fans should be happy to have it.
I don't believe any song is untouchable. This just doesn't add anything new to the song at all, much like his "Everlong" cover. Compare that to, say, his cover of "Teenage Dream" and it just pales.