Did Wolfgang Langewiesche ever change his mind about rudder pedals?
NO

There is no written record that I have found in researching this question that Langweische ever 'recanted' his beliefs. I cannot source or cite this negative however. I don't actually like this question, since only an answer that he did recant can be sourceable. Any cites showing him supporting his own written beliefs could be disputed by saying "but what about later in life?" This means that a negative answer can only be opinion.

It's not like he left in his LW&amp;T the statement that everything he had written previously was a lie.