Keep in mind that for many people "A Chorus Line" is a beloved show. I know guys who will go to see almost any production of it.
(I'm not one of them. The "I love A Chorus Line"-gene is the one gay gene I didn't get. I'm more of a "Chicago" guy.)
(But that's story, nevermind, anyway...)
But, if they altered "A Chorus Line", you would have millions of angry queens (of "a certain age",true) bad-mouthing it.
Another thing is that the show is so site specific that...what could you do to it? And the show is, quite possibly, the original "stripped down" show. One line on the stage and a bunch of dancers, that's it. The only thing you could do is make it more elaborate.
"A coherent existance after so many years of muddle" - Desiree' Armfelt, A Little Night Music
"Life keeps happening everyday, Say Yes" - 70, Girls, 70
"Life is what you do while you're waiting to die" - Zorba