Are these team relative?
Because if they're not, they don't tell us much other than that he's on a shitty team. We need to know how much he's outperforming them. Hint: this year, i'ts not at all. Last few years, it was by LARGE orders of magnitude.
Good question, and a fair point.
Those graphs are not, but here are some comparative graphs which compile the last 4 seasons. Arizona played a crapload of different defensemen in that period so I put the floor at 2000 minutes of ice time to catch the starters. These all have quality of competition on the y-axis, higher is tougher:
CF%:
Demers, Hjalmarsson, and OEL have had better possession numbers with far tougher assignments.
DFF% (dangerous Fenwick):
Demers and Hjal created more dangerous chances than against than Chychrun against much better competition. OEL was lower than Chychrun, but this makes sense as his QOC is so high because he's out there against star players all the time.
GF%:
This one honestly surprised me because I expected Chychrun to excel here. He's actually 5th here, even behind Connauton. I figured it was because of sample size but Connauton has played 188 games, more than I thought. He doesn't generate as much as others against much weaker assignments.
This last one is a different stat, faceoffs/60. So the higher the number, the more the player is deployed in certain situations:
This one is really telling as its clear as day that Chychrun is deployed against weaker opponents and isn't put out in all situations.
What really jumps out to me about Chychrun is he has never been deployed like a first pairing defenseman, almost exclusively second line. Demers and Hjalmarsson consistently equalled or surpassed his performance with far tougher assignments, and OEL was their #1 by far when he was there.
He could develop into a star defender, but his performance comparable to his teammates doesn't inspire confidence in that. The more data you see on the guy the more likely it looks that his great season was an outlier. This season he's a tire fire. How you have such a shittier differential than your teammates when you aren't even getting tough assignments is hard to explain. This is why I wouldn't offer near the packages being tossed around here, just far too risky.