Moyes also thought it a good idea to play Rodwell, Barkely, Osman and Anichebe as right wingers.
Whilst I understand what youre saying, Moyes et al were not flawless (I know youre not implying that). Duffy was given a chance due to injuries, did very well against top opposition (thought he and Johnny looked a very good pairing, seemed to understand each other well), then was dropped and never seen again in the 1st team, except the bench. Thats just not good man management.
Maybe hes not ready yet. I hope he flourishes at Leicester, and gives Martinez a headache, because I genuinely think this guy could be a solid centre back for us for a long time to come.