Lyric; Ambassadors; Park theatre, LondonA superb cast, including opera star Danielle de Niese, elevates Andrew Lloyd Webber's plodding 80s musical; Maureen Lipman gives a one-woman masterclass; and Neil LaBute's romcom gets a sharp, funny revival Andrew Lloyd Webber's musical Aspects of Love was first performed in 1989 and is based on a second-rate novel by David Garnett, published in 1955. The deficiencies of the no…