***The movie will either happen with Glenn soon, or not at all until another big start in her 50s/60s who can sing and has big box office appeal wants to take their chances with this iffy property. So assuming it DOES get made with Glenn now, I'm saying it's not very complicated to alter it to fit her current age presentation (which I think is 60s), and that alteration does not ruin what matters in the musical.****
This is precisely where some of us disagree with you. Speaking for myself, the reason I disagree with you is that the audience's perception of Norma's mental/emotional state, her desire to return to the screen, and her relationship with Joe would change considerably if Norma were/appeared to be in her 60s or older, rather than if she appears to be 50 at most. Do you not understand why, or do you still disagree?