Well, I think what Tom says makes sense though. Of course the show is driven by Rose and it was written as such. However, if you don't have a Louise that is able to make a successful transition in the audience's eyes from Louise to Gypsy Rose Lee, or a winning Herbie, or a June that can make you understand how faulty Rose's behavior is...then the show will definitely be less enjoyable and the theme less powerful.
I've read before that Tammy Blanchard was one of the reasons the GYPSY revival didn't thrive, not sure if that's true or not, but I do think that GYPSY is not all about Rose. Though in the case of a revival starring Peters it'd have been all about Rose for me
"Some people can thrive and bloom living life in a living room, that's perfect for some people of one hundred and five. But I at least gotta try, when I think of all the sights that I gotta see, all the places I gotta play, all the things that I gotta be at"