Oh, Diana! What can I say? The melodies are unmemorable for the most part, and the lyrics are absolutely atrociously awful. It's not quite as hagiographic as some Diana shows/specials, because it at least attempts to give a POV to Charles, Camilla, and the Queen. And somehow, Diana is the least interesting principal in this show. The show keeps wanting to really be about Charles and Camilla's enduring love story.
It doesn't say anything new or fresh, but then, are people who go to see a musical about Diana's life necessarily looking for a new or fresh insight or perspective?