My guess is that if they now choose to change of director for every other film, it's just because you can't really change the formula, you can merely try to film it your way.
“Washington's character was rock solid. He came to stand for the new nation and its republican virtues, which was why he became our first President by unanimous choice.”
“It's a different era. Our job now is to show leadership and vision and to help the next generation of artists.”