Well, I think there's a contradiction there. Even up to and including Joleon (are you sure he's an offical club ambassador, by the way? It's the first I've heard of it). To be fair, Joleon doesn't have anything like Ferdinand's prominence, and is fairly reticent about blowing City's trumpet other than when he's on with Nat Pike on the in-house commentary, which is an entirely different kettle of fish, of course.
I'm in a weak position here, because I don't have a subscription to Sky, BT or anyone else (other than City+!), but personally I find it tiresome when former players fight the corner of their previous club. I just don't need it. Nedum is to me an exemplary commentator — you can clearly feel his great affection for the club, but he just doesn't let it cloud his judgment. Weird to me that he hasn't been offered a major contract. I suppose he wasn't a big enough star as a footballer. Which is weird, because what you did out on the pitch in no way establishes fitness for purpose as a commentator.