I really hope the book revisions for MILLIE don't go that far. :)
I think the scene in which the African-American Muzzy pretending to be Swedish confronts the white Mrs. Meers pretending to be Chinese really points up the absurdity of Mrs. Meers' unexplained show-length masquerade without hitting anyone over the head with the racist component of it all. It might be nice to round out the Meers character a bit and let us in WHY she is pretending to be Chinese this whole time while really fooling nobody. And maybe to give her a big exit reprise of her song, please.
Does the whole white slavery aspect of the plot, which I found jarring many years ago when I first saw the film, but less so when I saw the musical, really rub people the wrong way now? Or is it the sort of lightly-explained MacGuffin that people don't really give much thought to these days? White Slavery isn't the cultural trope that it once was, so I'm not sure that anyone has ever (since the musical's existence) taken any of that terribly seriously.