I agree that in Buffalo Kromer ran a power scheme and the Bills had a dynamic running game. That synthesis with McVay is what I called their yin and yang.
But after four years together, they had developed what they could. It was good. Kromer is excellent and this is not a reflection of him lacking ability.
My contention is that McVay is seeking more than what he's had. It may not work. The new guy might not be as good a teacher, but Sean's history suggests that the ability to teach and communicate is paramount. I doubt that after four years, McVay and Kromer haven't exhausted their dynamic of possibilities. My belief is that our coach is looking to expand in ways we won't fully anticipate.