Once again, New York’s Whitney Museum is changing course, considering a complete abandonment of the Renzo Piano addition to its Manhattan home in favor of a new downtown outpost. “The Whitney’s latest about-face points to an underlying malady. Architects are only as good as their clients. They can give conceptual form to an institution’s identity, but they can’t invent it. The Whitney’s endless false starts are a symptom of self-doubt and internal confusion.”