I don't find statistics a great case for a players impact.
A few examples.... If you play PG for the HEAT and it comes time for you to leave...if you just look at stats you would say...oh...shit this PG has very low assists and doesn't run an offense very well. However that PGs role on that team is to give the ball to Wade - Lebron - Bosh and wait in the corner ... shoot the three if all other options fail.
You MUST watch a team play in order have a valid opinion.
Except that if you look purely on stats you would see that Mario Chalmers just isn't that good. And the reality is.. he's not.