Onana was always good enough and played well most of the time in the 6 role, he was clearly under instructions not to take any risks.I think it was more a case of the situation required a type of player that Garner was over Onana. This is one of those situations where a player is good but not good enough for the situation, he will have a lot more freedom and patience at Villa because of where they were last season and more than likely this season.