Depends which version of 'Mercy' you're talking about. If it's the re-worked version of 'Mercy', then, yes, that re-worked version needs to be re-worked. Actually, it's better if they just trash that version. The original is amazing. I wish we could hear it with clean production rather than the ripped version that is circulating.
I agree 100%. The original version was incredibly moving as opposed to the new version with that "Because, because, because..." chorus. I can't believe they thought that was an improvement over the original chorus.