In retrospect, I may have been too kind to “Diana: The Musical,” which is full of peppy, forgettable tunes with clunky, pedestrian lyrics. At the center, as Diana, Princess of Wales, Jeanna de Waal is capable but stiff. And the whole production — which was supposed to open on Broadway in March 2020 and has now been captured on film for Netflix — rushes through the story of one of the most famous people on the planet with zero wit or insight. You’ll leave humming the costumes. My 1 1/2-star review, at RogerEbert.com.