Have you ever stopped to consider what evidence suggests that Leslie Frazier will be a great coach?
He's certainly not renowned for building great defense. Yes, he coached an awesome run defense though not all those players were brought in under his watch. But what I see in the rest of his defenses is "meh." Average at best linebacking corp and a secondary that's underperformed for years (with the exception of Antoine). His guys - Madieu, Tyrell Johnson, have been complete busts, and that's being charitable.
And he certainly wasn't renowned for tactical brilliance, like a Don Capers at GB is. So what exactly fo we have here? Are you confident he can take us to the promised land?