Based on what? Is it that he coached the defense that allowed the most points in the NFL even though that defense is littered with high draft choices?
I actually know Vrabel, golfed with him and played basketball against him, years ago. He's a good guy but nothing screams head coach about him. He's kind of a loose cannon and immature. He's not detail oriented and doesn't have a "presence" about him. He is competitive though. I'll give him that.
I think he'd make a better college coach than in the NFL. Maybe he'll prove me wrong but I just don't see it. I don't even see how he was a candidate, much less given a job.