I too saw this in Chicago and agree with everyone that this is a big old mess, but I think there could be some salvation here. I really hope they keep Javiar Munoz, who was hands down the best part of the show. Not just him the actor, but the role of Nigel was the most thought out and fully realized character. He got the two best songs of the show, and it's almost like this was the character Elton John and Shaina Taub were the most interested in. Ironically, kind of like that documentary "The September Issue" where the film was supposed to me more focused on Anna Wintour, but the filmmaker were way more interested in Grace Coddington.
I think Jerry Mitchell could knock this out of the park and make it even more campy, which it needs.
Someone I think on the original board about this musical, said that Miranda should be like the Phantom. Where even when they are off-stage their presence is always hovering over. Honestly, when Miranda wasn't on stage you forgot about her. Meryl Streep is actually not in the film very much, but man do you feel her through out that whole film. I totally think this is possible, and also give Miranda's big number in the scene where she is most vulnerable, when she let's her guard down with Andy. For some reason in Chicago, her big number was concoting the plan to save her job, sung at the luncheon in Paris.
Also, they really need to up those costumes. Bring on Pat Field as a consultant, because to me that was the biggest travesty.