As an admitted outsider to this show I do know they hired Cyrus Nowrasteh to work on the final season, an infamous right wing propagandist who later did the Path to 9/11 right wing hitjob miniseries in the 2000s.
Like most right wing dudes in Hollywood, Nowrasteh was clearly an action junkie, trying to turn a glossy old fashioned primetime soap into something atmospheric like Miami Vice. The show was obviously very different and that is very evident in even just the opening credits sequence - I liked the new theme music, but as I am no FC fan I am in the overwhelming minority, and it's obvious they were doing something very tonally jarring with what came before (you can't sell a show with Rod Taylor and Jane Wyman in the credits as Crockett and Tubbs), and infatuated with Gregory Harrison. I doubt any of their audience cared about that and it screams tryhard. I do like the music though, and that opening with the omen of the dead falcon.