The Bills have quietly made some potentially significant changes on D this year. The proof will be in the results but philosophically it looks like they may be more open to man coverage and 5 man rush concepts.
I give McDermott credit for not sitting still.
With that said, If the Bills get exited in the playoffs again it will be a very tough pill to swallow. May depend on overall record and how they lose but I don’t think McDemott is absolutely secure.