Svechnikov, Dahlin, Hischier, Heiskanen, Pettersen, Necas, Laine, Sergachev, Hronek, Bratt, Provorov, Rantanen, Draisaitl, Nylander, Ehlers, Vrana, Kapanen, Barkov, Ristolainen, Lindholm, Buchnevich, Kucherov, Vasilevsky,
I won't comment on non-Russians, as they are not part of discussion, but just prove my point that you have to use them to try and make it look like you have a point. The whole discussion ALWAYS was about Russians having trouble going through CHL/AHL. Oh well, I might as well comment a bit. Dahlin? Seriously? A 1OA? And then stilll I easily give you Yakupov. Petterson? A 5th overall who should have been first of second at at least? And then both Swedes never played a single game in NA minors(nor should they). How are they relevant to the discusssion of developing through the NA minors? They are both a perfect example for two things: Europeans develop just fine at home. Top notch talented players are not relevant to this discussion as they step right into the NHL after the draft and never have to play in NA minors after the draft and those are exactly the crucial years for the slightly less talented players we are talking about the whole time. Basically the D-1 to D+3 seasons when it is determined at which level a junior prospect can contribute in men's hockey(might be even longer for defecemen). So, obviously here we are too with Laine, a 2nd OA who never played a game in NA minors. Hischier a 1OA who is from a less powerfull hockey nation of Switzerland, so he did play in the Q(while I assume the swiss juniors aren't that bad btw)... before the draft and never after it as a 1OA NHL ready prospect. But then even the 162nd overall Bratt never played a game in NA minors(so what is he doing on the list?). Drai? He is german. Germany does not have a top notch development system for juniors. Russia does. Draisaitl literally had no choice except he would decide to develop in Russia or say Sweden which would be odd as I know quite a bit about german hockey and they start the morning with a prayer to canadian hockey. One could use Draisait as an example and explanation of what was going on with russian prospects in the 90s. Back then when the russian leagues were falling apart young Russians had no choice but to leave for NA. Barkov? 2OA, never played a game in NA minors. See? Even for non-Russians your list is just vanishing in the haze. I could go on dissecting every single non-Russian player's development on your list, but let's stop at that and move to the actual core of the problem in question.
As for the Russians on your list I am really tired of repeating myself as most North Americans would bring up all the same names ignorantly so often and I explained it what feels like a hunderd times.
Provorov left Russia at 14. He is actually the product of the US defencemen development systen, which is quite adequate if you look at their D. We are not talking here about Russians leaving home at 12 and never developing in russian juniors.
The guys who really stand out on your list are Buchnevich and Vasilevskiy. With Buch you pick a guy who actually proves my point. He developed in the KHL after the draft, then came to NA to play a humongous sum of 4 AHL games in NA minors. So he was basically a NHL ready KHL product. Vasilevskiy is an another fine example of development of Russians at home. In his case he is also meeting those other criteria. He ALWAYS was a top tier goaltending prospect. He never needed NA minors and was NHL ready the day he came to NA. He's had quite a KHL resume by then(which can be a very good idicator for the development level of a player. Ususally those who already thrive in the KHL have little trouble stepping right into the NHL). He is no Berdin.
Not Kucherov again... I explained this a thousand times. He was a 1OA level talent, always. The NHL makes mistakes. It's not new. He never was gonna fail. The uniqueness of his situation is though that in Russia he was stuck with a bad org(which was fixed right after he left, but he obviously shouldn't have bet his hockey future on an opportunity of the orgnization he was with being fixed overnight). He HAD to leave. He had close to NO choice. And Ia am to this day sure the whole CHL/AHL time was slowing him down rather than helping his development. But he is just that kind of talent which won't be denied.
Yeah, Svechnikov again. I give you the fact that he played in the CHL. BUT again he was a 2OA behind Dahlin. He never needed minors after the draft. We are not talking that kind of talent here. They are going to pan out no matter what 95/100. To them is way less relevant where to play. And then as already mentioned there is a 1OA Yakupov still.
Sergachyov remains the only one Russian who somewhat proves your point. Somewaht as a 8OA defenceman he also was pretty much a top tier talent. And it was discussed another thousand times there's huge difference between russan forwards and defencemen development. You can easily look it up in my post history. I am a strong proponent of russian forwards developing at home until the age of 21-25 depending on their development progress and talent level. I am way more ambivalent when it comes to defencemen as I do see that Russia struggles to develop defencemen properly.
All in all even for non-Russians your list falls apart. And most importatntly I can give you a sheer endless list of Russians who prove the exact opposite of your point, the ones who were top6 players on russain junior NTs before the draft and then their development in NA reders them borderline minor leaguers in Russia(That is what Kostin looks like right now and it angers me because he had the talent) or career AHLers.