Playing in the KHL is not playing in the NHL. They don't all make it here just because they played against men there. With the differences between there and here, he is still a rookie and you're trying to justify a rookie in the top four. One obviously wouldn't and that's a good thing but neither should.
You're making "rookie in the top-4" a much bigger deal than it really is, without even considering that said rookie is a 24 year old international level player on one of the big 7.
Sure he may not translate, but you're acting as it it's some big taboo.