Ok so to me that makes this hire a little better TBH.
To simplify what really happened, Hedwig Napier just hired a former NFL OL coach (albeit a fired one that did a questionable job) to be... OL coach.
That's all that happened. Just like all the Co-OC, Co-DC, AHC crap, his OC title is just optics.
HN calls the plays, so there is an open, useless OC title he had in his pocket to use to lure a guy.
I looked as his wiki, I'd give it a Meh+. Bigger question to be is how he got the NFL job in the first place. That was a big jump.