However, to fire someone at any time during the process is always a tricky situation for both sides. Does the actor "admit" to being untalented? Does the producer admit to hiring someone untalented? Better to "leave the production due to creative differences" behind the scenes, rather than be fired publicly.
In the movie in question, the producers did, in fact, offer the actor a "face-saving" exit.
(Guess where we took the Grandlads today?)
der Brucer
PS Eldest lad, 10, was quite disturbed by the hero going over to the dark-side plot. I, on the other hand, was annoyed by the quick jerky edits of the action scenes which made the fluidity of the action hard to follow.