purity and beauty of failure
This claim feels so much like a qualification designed for Brecht and Benjamin's potential publisher. "Don't get me wrong, it's definitely a failure."
How seriously do we take Benjamin's altered stance in the face of Brecht's criticism? I think very seriously - but I think also that it is not his most "natural" take on Kafka, it is not Benjamin's inclination to damn Kafka for mere obscurantism.