I highly doubt that U2 is going to pull the trigger on Songs of Experience. I have a sneaky suspicion that they band will retool or break up.
The decision to release Songs of Innocence wasn't the wrong one at all--not by a long shot. It was the structure of the album and the choices that sunk it for critics. No one cares if it was given away for free--that's not the problem.
The problem is, U2 are simply irrelevant to any discussion of modern music.