I might make the argument that 13.4 extra feet to work with East-West is pretty substantial. It's at least a couple of strides for most players. I actually was on the side of international rink size to NHL rink size being overblown until I saw this stat, now I'm not so sure. It seems obvious to me that with that much extra space, good skaters like Marcus Johansson, Jonas Brodin, Kirill Kaprizov etc. would have an advantage. Of course, that blade cuts both ways. Marchessault is a pretty good skater, too. Then you've got your big guys that can also skate, like Pietrangelo, who would have even more advantage than they already do.
Doesn't really matter, though, as the NHL rink size is what they play on, and it's there to stay (you can fit more ticket holders in if you have smaller ice). I am a little concerned about any future playoff series if most of our prime-time players are under 6'0", as that did not seem to go well for Kaprizov in this last series. Fiala fought through it though, so maybe there's a lesson to be learned there by our other small guys.
I'm a little surprised Kaprizov wasn't able to fight through it, given that he'd been able to battle through checks all season and maintain possession of the puck, yet suddenly wasn't able to in this series.