Vrabel is the guy we need to go all in on. He's a culture builder. We will go from a soft team that gets bullied into the Bully. The team identity will be physicality on offense and defense with a punishing rushing attack with physical WRs and a 3-4 defense to capitalize on the current young talent while a 3-4 is also an easier defense to find talent for.
We don't know what Joe Brady would do as an HC or Ben Johnson, but we know what Vrabel will bring. It's cool not to like ML right now, but Vrabel would have a steady FO, and if ML hands the personnel decisions over to Vrabel, he has a good eye for talent, so that would work.
Vrabel coached Taylor Lewan and he got the most out of him. He'd have a good insight on how to deal with Penning and get the most out of him as well.
He played Defense and saw some time at Offense, so he knows both sides of the ball.
If we hire him, look at potential Titans players or other players who played under Vrabel to help install his team culture.