Royal Opera House, LondonThere's less gravity defying, more gravitas as the Cuban star makes a dazzling return to the Royal Opera House in a seamless show of crowd-pleasing highs When the curtain goes up at Covent Garden to reveal Carlos Acosta, Cuban legend and leading man, standing on his own, one hand held aloft like a statue, white tights topped by what could be thought of as a shred of a toga, it is a moment of …