A couple of things to consider
Defensive skill and defensive impact aren't necessarily the same thing. I don't believe Asplund's defensive skill suddenly went away. I think it's more likely that whatever scheme Granato is using this year is less likely to create the sort of scenario that would allow his skill to translate into meaningful results. In the same way, I would expect a forward whose offensive impact is driven by shot volume to have less of an impact here than he would in say Carolina.
The other thing is purely a guess on my part, but I think defensive numbers have a lot more "noise" in their data. It exists in offensive data too, but since we have a clearer picture in the box score/play by play data, it's easier to cut through the chaos and find what a player is bringing to the table. Defense is tougher because ultimately, your value is heavily determined by how much doesn't happen and a lot of unrecorded events (like players out of position).
In Asplund's case, it's a 27 game sample with no consistency in GP and six different line combos, only one of which he played more than 30 minutes with. That was Mittelstadt and Olofsson. We know how they were defensively early on. Hard to draw a clear picture based on the information provided.
- Michael Ghofrani
This is where I stand mostly. It’s tough to statistically measure things that don’t occur and properly attribute value to it.
You know me, I’m a numbers person through and through, but over the last few years I’ve learned to respect a few of the nuances that numbers people don’t really acknowledge.
I think a lot of what’s said by Sabres analytics/intellectual Twitter is accepted as fact without any pushback and over time bears out to be untrue. And Asplund is case subject #1
Edit - and I fear Tyson Jost is the next Asplund where people will have these narratives that he “fixes” players or is this play driver. Most of his career he hasn’t been that