Most valuable? yep 90%.
'Best' 0%.
The guy has maybe the 2nd best hands, one of the best shots, one of the best outlet passes, perhaps the best vision, and is one of our top two puck luggers.
He has perhaps the worst stick-checking ability (outside of Prout/Stollery/Hulk and such smegma), is perhaps the worst in front of the net, plays odd-men rushes fairly terribly, makes bad pinches, takes some ridiculous chances in trying to break up plays, gets lost in his zone. As a 22 year old he is regularly outbattled. Not nearly physical enough (or even as he has been in the past). Regularly loses his check and gives up on plays. Routinely leaves the crease to chase behind and in the corners. Occasionally loses his poise.
In all of the 1st paragraph, Santini and Merrill are WAY behind him. In all of the second paragraph, he trails Santini and Merrill.
I would say all of the above description of Severson could have been said about Zidlicky a few years ago as well.
A valuable defenseman - you bet. Maybe our most valuable.
Our best defenseman? That's laughable and ridiculous. Andy Greene is our best defenseman because he has both sides of the coin and poise galore.
To be the best you need to be complete. I fully believe Sevs could clean up his game and be that guy with the right help and right situations. The reason behind almost that entire 2nd paragraph is: He is 22 and playing on a top pairing.