Well, I'm an overseas tourist, who finally got to see the show yesterday (and below 50, too!). I honestly don't think it doesn't matter that the Profumo affair is not well-known among the young and foreign. With this reasoning, Evita should only appeal to Argentinian people of a certain age and look how that show did.
The drab title is certainly a problem - when the name doesn't ring a bell, why would you care for the show at all?
But I wasn't too impressed with the show itself either. Way too many "dialogue songs" and too little insights into the leads. I would have liked to hear much more about the two girls, who they were, where they came from, what made them dive into this world of "old rich men"? Clever lyrics could have drawn a comparison to today's vapid IT-girls. The second act was even worse as the trial dragged on - come on, we knew how it ended. Ward/Hanson was just sitting there, staring. Would have loved to have a song from him there how he felt about it all. And why no song from Mandy and/or Charlotte how THEY felt about it all? Did the writers not dare to go there because the two women are still alive? Instead we get the big 11 o'clock ballad from someone we don't know and don't give a damn about (Profumo's wife), not to mention that these godawful "Ooooh, I know my man sucks but I'm a woman, so I'm gonna stick by him because I luuurve him so and can't be alone" songs should have died out 20 years ago. Lovely tune should have been used for something for the girls.
There's a good show in there, but not the way it's done now.