I think the guys on WGR put it really well tonight:
Frazier still calls a defense as if he has every one of his starters playing, including White and Hyde, and won't scheme anything different. He puts an insane amount of responsibility on his players, even lesser players like Jaquan Johnson.
It doesn't work. We have the talent still, but he isn't using it right. I don't know if it was him or McD that called the blitzes later, but they worked really well and made Brissette uncomfortable.