The thing I can't get past in this review is "dutifully recounting Princess Diana's story". Did they see James Hewitt?
The Pop Culture Happy Hour review seems more on the mark:
"It's part camp, part sincerity, part morality tale, part Wikipedia entry, and part Waiting For Guffman. Or, I should say, part Red, White, and Blaine, the show they're putting on in Waiting For Guffman."