I like the a capella part of the song though I'm not so fond of the vocals in the end, but I LOVE the rest of the song ... I just think the end could have been done differently, better.
And I don't think that it's not a U2 song because the voice is too "dominant". In fact, I would love for the band to record more stuff with more room around the voice, as Bono once put it, stuff that is more focused on lyrics, voice and singing. That's why I like the accoustic stuff they've done.