What you see in the chart above was first suggested by oilerBC in the comments of this article, namely adding a 3rd and fourth metric to advanced stats charts to tell a more significant story The horizontal axis shows qualcomp, specifically Corsi relative quality of competition taken from the venerable and terrifying Gabriel Desjardins' behindthenet.ca. The vertical axis shows percentage of percentage of faceoffs taken in the defensive zone, again from the venerable and terrifying one. The bubbles are color-coded: blue means the player in the bubble has a positive zonestart-adjusted Corsi, red a negative. Finally, the size of the bubble indicates absolute value zonestart-adjusted Corsi.
Tom Gilbert stands out in an enormous way here. Gilbert's adjusted Corsi is nearly zero, even while taking on the toughs. Corey Potter has a positive adjusted Corsi, he's playing against far easier opponents. Cam Barker is getting the easy opponents yet still has the worst adjusted Corsi amongst the defense.