Why have even senior City Ballet dancers been deprived for so long of interpretive wisdom about this (and many other) Balanchine ballets? When Peter Martins was ballet master in chief (1983-2018), Ms. McBride was among the many creators of Balanchine roles who — as if in exile — were seldom if ever invited to coach their roles at City Ballet. Mr. Martins retired under pressure on Jan. 1 after allegations of physical and sexual harassment. Over the decades, no single feature of his artistic policy has caused more grievance than this disinclination to bring in Balanchine alumni.