Mobility is massive in the PL. In season one in the Prem we got away with Norwood due to the effectiveness of the overlapping centre backs. In season two they'd gone and you saw Norwood's limitations on an orthodox 3-5-2. His lack of press resistance and mobility. The wide centre backs was a cheat code.
He's fine in the Champ and will be for a few years yet. He's never had mobility and he reads the play defensively better than he ever has. His stats for interceptions and ball recoveries are very high. What you want ideally are two mobile partners even at Champ level to compensate for his weaknesses. We haven't had them since we came down. All our midfielders strengths lay elsewhere.
Doyle was mediocre at best until he was placed in the Norwood role. He now looks a different player.