"The quality of a show isn't the factor of why shows flop."
That's just not true. There are shows like LESTAT and DANCE OF THE VAMPIRES and IN MY LIFE and HOT FEET where the producers had more money than god, and despite them spending millions on marketing, the shows still flopped and closed early because the word got out to audiences that the show was awful and ticket sales dropped to nothing within weeks.
Shows don't have to be brilliant to survive, but if audiences find out that they're bad AND not even particularly entertaining, they end up closing rather quickly. But, there are plenty of shows that got middling reviews that have been able to survive and thrive because, despite their flaws, they have a story or a score or, most importantly, a STAR (look at what Hugh Jackman was able to do with BOY FROM OZ) that audiences want to see in spite of anything.
"What a story........ everything but the bloodhounds snappin' at her rear end." -- Birdie
[http://margochanning.broadwayworld.com/]
"The Devil Be Hittin' Me" -- Whitney