One of the problems with stats is that it is very difficult to measure the effectiveness of each touch.
For example, every week we see countless examples from every team where the ball is held 60-70m from goal and kicked sideways to buy a bit more time. That is an efficient kick. There may be 4 efficient kicks until an inefficient one turns it over, so the kicking ratio on that little exchange is 80%, which is considered respectable.
The reality is that nothing was achieved. How does this compare to a contested situation in traffic where a player gets his hand to the ball and pushes it a metre to his right, freeing up a team-mate who collects, runs 30m and kicks 50m onto the FF's chest? Or a forward who makes a contest when he is out of position and creates a crumb? Or a player who makes a lead when he is exhausted and takes a defender with him, creating the space that leads to a goal?
Those little things are not even stats. It seems to me that simply counting kicks, marks and handballs, and distinguishing between good ones and bad ones is just the start.
When I watch footy, one of the things I look for is the player who is the first to get his hands on the ball when the other team have it. When we kick a goal, I always ask "Who got his hands to the ball first?"
Those touches (they may not even be stats) are critical and, in my opinion, win games.