This was never a this side is right and that side is wrong. As counter to your Jim Leyland example, Dusty Baker showed us in 2022 that defining roles and putting guys in their expected situation is also the way to go. They rolled to the title with a lethal combo of Neris, Abreu, Montero, Presley. Kept this same rotation when ahead and rolled past the Mariners, Yankees, and Phils.