There's no need to get condescending about it.
And Barkov is still not playing anywhere close to his potential as well, even with the 5 years time in, just FYI.
He doesn't grasp the concept of the direct approach of NA hockey. He doesn't shoot, he doesn't drive the net, he doesn't like to have the puck on his stick at all, which means he doesn't use his size nearly as much as he could. Even with that, he still almost went a PPG last season.
Some players really have the European style ingrained in them, and they don't use their tools nearly as much as they should for NA hockey. Even though it's been 5 years, he still hasn't made huge changes in that area. He's gotten a little better, but not nearly as much as you should to come close to reaching his potential.
But, with the small sample size of one game, he seems to be improving that area of adjustment to a more NA style of game. So his offensive totals could shoot up.