I know they can do that. I mean it's their show. They can do anything they want. The only question is will it be successful. The first season was decent in terms of quality but the ratings are bad so they have to do something to shake things up. I think that was one of the reasons why they were happy to see her go. I think they see this as a chance to do something they didn't feel they could do with the old actress. Maybe something like alternate universe but it could also simply be for going for a different tone to the show so they want to bring in someone who will bring more humor to the role or maybe someone who is a better actor because they want to do more drama and less action.
Jason
Jason