I didn't have the same reaction about the Mary J version of 'One'.
Not that I thought it was 'great', I thought it was fine. Mary J sounded a hell of a lot better than Bono. Why not just let her sing it by herself? Why not produce the song for her? Why not just let her cover it all by herself with her own producers? It was another in the long line of 'image issues' that U2 deals with. They 'look' like they are really pandering to get into a wider audience. Maybe because they are.
I only heard it a few times on VH1 and live so I couldn't give you a critique of the production. My general feeling about that is, considering we still have the U2 album version and hundreds of excellent live versions, it seems like a silly gripe. It seems like fans who feel their sacred song has been tainted. I am not that idealistic about U2, not anymore.
I have gotten to the point with U2, where they are so unabashedly mainstream, that things like this are to be expected. I just hope for the best quality of music, that's all.
I love NIN, when Reznor remixed Vertigo, I thought it was an awesome idea, I got the song and I praised it up and down. Now I listen to it after the newness is long gone and it sounds pretty bland, to be honest. He's done amazing remixes for other artists (ironically his Puff Daddy remix is great). So I guess what I'm trying to say is, whatever the end result is of this Will.I.Am thing, it's going to stand on it's own. If it's good, I'll say it's good. If it's not, I'll say "I told you so"