It just seems unfathomable that the manager doesn't know what his assistants are doing. I live just outside Colchester now and before the Karsa/Culverhouse thing broke, I met a bloke while playing golf who said he'd worked at Colchester United as a sports therapist while Lambert was there and there was a culture of bullying, starting with the manager. I didn't particularly believe him, to be honest - I didn't know him at all, just someone who asked if I wanted to go round with him and we started chatting about football cos I was wearing a Villa jacket.
Lambert doesn't strike me as a bully at all, but as Karsa/Culverhouse are proven arses and Keane clearly has various temperament issues, it may be that Lambert likes his coaches to be a certain type to offer that sort of motivation.