Yeah, watching Kadri's line on the ice followed by Jost's line is night-and-day. One of the lines is hustling and harrying and covering open ice and passing lanes to force turnovers and snuff out any offense the Blues try to create; whereas the other is typically one-and-done in the OZ and frequently gives up ice without much in the way of a challenge or forecheck.
I recall
@Pierce Hawthorne suggesting a few months ago that this teams issue was 2C when most thought 3C was the biggest issue, and the more this season has progressed the more I've found myself agreeing with that. Upgrading on Kadri may be the single most important action Sakic needs to take this offseason - other than resigning Makar, Landeskog, and Grubauer of course.