Even adjusting for his zone starts. his defensive numbers are pretty badI mean, he's a 4th for a reason
he's on pace for 33 points, and is a net plus-minus positive player and a good PKiller on top of being an elite skater. That's pretty good for a 4C and he could've had more points if BMW line didn't suffer injuries. Also, if Lindy didn't run him out there every single dzone faceoff he would probably have decent corsi numbers too
Puljujarvi is expensive and probably not better than what we got.
If you can't maintain possession (and lord knows he can't because of the hockey sense, hands, passing ability and 10 other things he lacks) it's hard to drive play.