It really is too bad; the show wasn't award-worthy, but it was a fun night of theatre. I can't say I'm surprised, however, given it had a narrow appeal. If you loved Diana the person, you probably would have hated it. But if you like super-campy shows that kind of poke a lot of fun at public figures, it was a fun way to spend a couple hours. In the end, though, the Netflix bad press and the atrocious reviews (especially the Times review) meant this was always going to be an abbreviated run.
I just hope the cast land on their feet, especially Eryn Davie, who to me was the standout. It's not easy to make Camilla look sympathetic, but she carried a lot of the emotion of the show I thought. Hopefully the flop won't taint the cast's future prospects.
As to what it says about the future of this season...I don't like that two shows with original scores (Chicken and Biscuits is the other) have already shuttered and it's not even January 1st...