Who does Jim Crane fire first? Ed Wade, the lame duck GM. Mills, the entire coaching staff; or everyone? I think it's safe to say some people will go. Firing people isn't the main thing, though. It's who he replaces them with that will establish what type owner he will be and establish his direction.
How soon will he start making moves. The sooner the better is OK with me. That will re-connect him with the fan base.