Shallow opinion here --> Coach Freeman deserves the credit for taking on the HEAD coach role in this. In his critical press conference he sort off openly (without naming names) expressed a big negative about how some of the drills and details teaching were going on in the pre-game practices and sessions. He specially sighted an example: some of the DBs were NOT getting sufficient detail training against specific situations and opponents as to how much speed to expect at critical moments of a route. He was NOT AT ALL happy-talking about this sloppiness in pre-game in-week practices. I heard (sub-rosa) criticism of the staff's behavior here, not the players.
THEN --> Coach Ash took charge of HIS job as DC, and whipped all of this slack into shape. Since the players had lost a lot of practice and session teaching, it then has taken some "healing" up the lost time, and getting us back to our Rockem' defense style with our EFFECTIVE effort and turnovers. (I can imagine, by the way, a new coach inserted in over the heads of the rest of a retained staff NOT immediately micro-managing the hell out of those other staff members, and some of them not having the personal discipline to make the go-all-the-way effort without that in-your-business overseership.)
So. Credit? Coach Freeman: Yes. Coach Ash: Yes. Some other coaches?: more intensity and teaching please.