Wait, does that WAR number indicate Adam Boqvist is 10x better than Seth Jones? According to this Jones has a 6 WAR% and Boqvist has a 61. Like Boqvist is going to get you 10X as many wins above a replacement level player than Jones?
No, it's a percentile.
It takes ice time, deployment, qoc into account, as well as all the underlying metrics.
If Seth Jones got the same ice time, deployment, qoc as Boqvist, his WAR
percentile would be higher by the JFresh model.
Of the players deployed like Seth Jones was, roughly 94% of them were better.
Of the players deployed like Adam Boqvist was, only 40% or so were better.
That said, Seth Jones WAR (that is, the raw underlying stat rather than population percentile) has been poor for awhile, not just by JFresh's model. Evolving-hockey, my favorite model, had Jones as a -1 last year, while Boqvist was a +0.4. Year before that it was close. 0.9 for Boqvist, 0.8 for Jones. The difference being of course, Boqvist was putting up a WAR roughly as good or better than what you would expect a 20 year old 3rd pairing dman to put up. While Seth Jones was decidedly NOT putting up the kind of impact you'd want a supposed elite #1d playing in all situations to put up.