Pretty sure that it was mentioned he needed work on his edges, and that he was particularly fast.
Gaudreau not fast? Well, maybe not McDavid fast, but he is fast, and he is exceptionally quick, with superb agility. He is a fantastic skater. If Kaprizov is anything approaching him as a skater he'll be fine.
It's often overlooked how important skating is as the basic skill that matters most in the NHL. Almost all of the greats were great skaters, and now even 4 th liners can skate. The minor leagues are filled with guys who were star scorers, but are just too damn slow, or have some other flaws in their skating.
Most Europeans are better skaters than your average NA player when it comes to skating, but recent experience with Pulkkinen( mediocre skater) and Granlund(has worked hard to be average) has made me wary of taking anything for granted.