The problem starts upfront, permeates to the linebackers and settles on the back end. The Dline doesn't eat space, keep oline off linebackers or get any qb pressure. Linebackers are never clean to make tackles, cannot shed blocks and consistently blow pass coverage assignments. DBs are tentative.
I truly believe we have more than adequate talent at every level so I conclude its coaching. Since it all starts upfront and Hoke is the position coach there, I suggest we start by making changes there.