I think its the wrong type of story for a 'star' to take on. You have to fall in love with Fanny Brice, and root for her. When the actor already has a fan base, it would just be the Lea Michele show -- and damned be the story.
(That being said, I don't particularly care for LM -- although I'd love to sing like her -- and likely would stay away if she were to be cast.)
If we're not having fun, then why are we doing it?
These are DISCUSSION boards, not mutual admiration boards. Discussion only occurs when we are willing to hear what others are thinking, regardless of whether it is alignment to our own thoughts.