I care because of the reason I said. Cynthia Erivo's craft, caliber, and place in the musical theater is far too elevated for her to be even dream casted as a muse. Ariana DeBose is the leading actress in a successful Broadway musical, after having given years in the ensemble.
I'm assuming you like these performers, since you're dream casting them. If you actually like them however, respect their talent and hard work enough to dreamcast them as Meg /leading performer, and not just the Greek chorus. I'm not implying Greek chorus is bad (hell, Carrie Compere was an absolute Godsend in The Color Purple) or ensemble tracks don't work hard, but it's incredibly insulting for these actresses. They shouldn't have to fight that hard to get audience's attention only to have it thrown right back to the main story and those actors.
As for Westcoast Actor/Dir - you're right. We don't know what the musical would look like so it's possible that muses are more important than anyone else in the story. They were certainly the most interesting part of the movie, second only to Hades. But we can only be so hopeful.
Caption: Every so often there was a rare moment of perfect balance when I soared above him.
