Based on what I know about Garrett, you're flat out wrong on that point. Not only has the "swagger" been minimal (big difference to me between false bravado and swagger) As far as his demeanor, I'm not saying he's gonna be Vince Lombardi, all fire and brimstone. He will, however, unlike Phillips, hold players who don't give maximum effort accountable.
You're basing too much of your opinion on him on his playcalling, and let's face it, he's known for two years now that he's been handicapped by that offensive line. I've said before I think he'll eventually be a solid HC in the league. Don't know if that time is now, but if it's not, he fails, and we bring in someone else next year. We're not losing a damn thing giving him the job now and an opportunity to prove himself.
But above all else, you need to understand that the way he wants to run things could not be more different than the way Wade did.
And if I'm wrong? Again, someone better suited replaces him.