Well, I agree it is risky hiring an OC with no experience calling plays. But, they say he's a Wunderkind so I'm willing to give them the benefit of the doubt until I hear from him how he's gonna coach a bunch of the veteran players. I do know it's gotten good marks from pretty much everybody in the sports media.
Rex back in B'more seems a stretch to me at this point. He's got some good points but plenty of bad ones regarding his personality. He wasn't exactly a success after he became a head coach and didn't have Ray Lewis, Tony S., Ed Reed, et. al., to carry the D. I'm not sure I'd be happy with that hire.