Richard Strauss’s operatic swansong Capriccio made an elegant and untaxing conclusion to the Royal Opera’s season. It was done in concert, but there was a fair amount of acting, more from some of the participants than others. Renée Fleming as the Countess, who feels she has to choose between a poet and a composer, wrung her hands, strode around as much as her fabulous silver and black gown allowed, and in the final scene smote her brow in best distraught Joan Crawford manner; the others huffed and flounced and strode off into the wings, and there was, as much as...