Judge Andrew Napolitano was just on Fox radio saying that the otherwise brilliant defense atty. really screwed up by even HINTING that Libby would take the stand, then not putting him on. AN said this tells a jury something is wrong, and worse, the judge let in certain evidence based on the presumption that Libby would testify, and was himself angry that he didn't.
Wells made the calculation that there was no way he would win with this jury and made all of his maneuvers with the express purpose of setting up an appeal.