He did a pretty good job when he held that role in Montreal. . .
Interestingly, while all three of the ones you mention have had good to very good success as coordinators, all three of them were less than succesful as head coaches.
Etcheverry's defences are always extremely entertaining to watch; but when the Argos promoted him to head coach a few years ago he didn't last very long before Pinball had to show him the door. Berry's offence in Montreal was a juggernaut, but as the head man in Winnipeg he didn't fare too well (although certainly better than the guy who replaced him; about whom the less said the better). Daley has run good defences in years past; as a head coach, he was less successful, and last season back as a defensive coordinator he was again not very successful, but he's in a different role this season in charge of special teams, so we'll have to wait and see.