Keith Butler’s retirement and the addition of Brian Flores as inside linebackers’ coach and senior defensive assistant changes the Steelers personnel, and will definitely have an impact on the Steelers defensive scheme. Both Teryl Austin and Mike Tomlin have stated Flores will have a much bigger role than just coaching the linebackers.
To be honest, hiring one of the better defensive minds in the NFL, the architect of the Patriots dismantling of the LA Rams offense in Super Bowl LIII, and limiting his input to coaching the linebackers would be dumb and a waste of talent.