Aston Villa's Defensive Possession System

Aston Villa are prone to giving up a bunch of chances in a game when they try to have the ball. Unai Emory is trying to implement a defensive position system in Aston Villa and it is working only to variable degrees. If you believe that there are players on this team who can improve in defensive possession as Emory coaches it, you can make the case that this team is ready to improve defensively  as their defensive possession increases in efficiency.