It didn't take him longer to develop, it took DA longer to put him in the role he played through college with the likes of the Watt brothers. The role that got him drafted in the first place. He's a pass rusher, not a coverage linebacker and that is always who he's been.
Game 14 is NOT midseason. And he should have made the personnel decision to have Baun rushing the passer years ago, not just weeks ago. He is very behind on making this decision.