If you're from Vancouver, did you catch what he looked before and after that back injury? I ask because while I realize he was drafted as much for his above average two-way game as his offensive talents (which infers his skating had to be at least average and there had to be something of a physical game) by the time I started seeing him (as a rookie), he'd lost that year of development to the back injury and seemed pretty much sub-par in those basics (which no doubt contributed to his eventual rep as a "defensive liability"). If you saw him as a prospect (pre injury), I'm curious if you noticed a difference?
Anyway, to answer your question -
As someone who has watched him since his post-injury rookie Vancouver days thru his tenure in Buffalo, I'd say the kid's skating has seen a 180. While in Buffalo I cringed for the kid so often that I swear I've got wrinkles now. He'd have flashes, especially toward the end of last year, where he seemed to shy less from the physical game, but nothing consistent to say he'd turned a corner. Since the off-season in Sweden, I've been seeing a totally different player.
His first Preds game was more so-so and I figured it was possible that I was being too hopeful for the kid. But the last 2 games, just swell to see the very notable difference, especially last night (the rare penalty notwithstanding) when he saw legit 3rd line minutes and seemed to be able to get more into the flow of the game.
I'd guess it's not all on the off-season training regime, I mean some of it will be due a re-focus on his whole game (don't think being drop-shipped into 1C in Buffalo as a rookie helped his development either, lol), sorta getting back his basics in that way, as well as refreshed confidence, etc. But the kid's skating stride itself is simply different, less "stumbly", he transitions faster a nd gets into the play quicker. And of course the bonus is that he's then into the play harder, better positioning on the back check, etc.
I'm not saying he's Flash Gordon, lol, but so far he looks at least like he can skate in the NHL again. Accounting for more time needed to fully adjust to the new team, systems, coach's expectations, linemates (if there ever really is a definitive 3rd line)... Well give him another 7-10 games to fully acclimatize and then re-evaluate the skating basics. I'm imagining his physical development trajectory might be along the lines of the Sedins, who will never been known for their speed and took to 26-27 to even get where they are now but don't appear to be slowing down quickly