Buuuut since it is based on a book, it's technically...not original.
And last I understood, an out of town try out was just that; a try out to see what works and doesn't work in the show, including cast members. If they're booting out cast members out of town, then obviously it's because they weren't right for the roles they were cast for. But I doubt the recasting of the production will predict its outcome. From what I've seen in this thread, it's actually generating more excitement for the show.
"Peace! The charm's wound up."
--Macbeth