I mean, if you are directing actors to do one thing and then directing them to do something else entirely because the one thing you wanted them to do may not work, then you are just shattering their confidence in the project.
I graduated from high school early so I could move to New York to do 'A Little Night Music' out of the New York City Opera.
Find out who you are and be that person. That's what your soul was put on this Earth to be. Find that truth, live that truth and everything else will come.