Some filmmakers are so stubborn they refuse to let an actor give them any input on the project, and on the flip side some great directors have taken suggestions from their actors to create something great together.
And then there are the "suggestions" made by pissed-off actors demanding things go, which seem to be the most radical and controversial changes you can make. But did they make the movie better? Eh, not really.
Harrison Ford made sure J.J. Abrams killed off Han Solo in The Force Awakens because he has hated the character since Return Of The Jedi, maybe even since the very beginning. I wonder what he had to do to J.J. to get him to agree?
Angelina Jolie made a similar demand while filming Wanted, insisting her character commit suicide in the end after "learning the true nature of her work", which would have been a fine ending if not for the love of money.
Wanted made big bucks at the box office, but her suicide plan had ruined any chance the studio had to make a sequel and cash in on the curving of bullets once again, and Angelina refuses to return their calls re: Wanted to this day...