I know that the quality of the electric one lacks a great deal compared to the album but a slow acoustic version seems to go against the spirit and the intention of the song lyrics, it removes any uplifting quality whatsoever. I know it sounds nice to the ears, just like Hallelujah does, because Jon can sing those long slow things well. So I guess it depends what you're looking for listenability or the songs message. Tbh, I guess the message of WWBTF isn't very deep anyway.