It's definitely Beane/Mcdermott for the whole roster though. The lack of talent? Sure I would say that's mostly Beane.
But McDermott also has a big say on how this roster is constructed.
He hated the Brian Daboll philosophy where they couldn't run the ball.
So Now we over corrected on offence, and have constructed an offensive identity where we want to run/play clock control. That identify, McDermott definitely has his fingerprints on