I feel like the thing dividing people about this one is not knowing the context of all these scouting reports or whatever. People are taking comments from February or whatever and pretending like they're 100% relevant now. But sort of like Kotkaniemi, Seider had a massive spike in value in those last two months.
I think how it went is this: Seider started off the year in Mannheim, but wasn't getting to play much. Scouts sometimes couldn't even see him because he would be scratched or played like 8 minutes that game. Then he went off to the Div 1 WJC and absolutely destroyed it. He was the best defenseman, second in total points just 1 point behind Dominik Bokk (the first round pick, I might add). Scouts were kind of like: "Hmm. That's intriguing, but it's not a very high level of play."
Then over the remainder of the year, Seider got a little more icetime in Mannheim and did very well. Yeah, he only put up 6 points, but his average icetime was supposedly like 12 min a game at the end of the year... and he didn't play on the power play at all. Somewhere in there, he goes to the combine and dazzles GMs with his interviews. (Also a very high VO2max, which is one of the best predictors of playing pro games.) He goes back to Mannheim, plays well en route to winning the DEL championship. 5 points in 14 games, which isn't great, but, again, he's getting almost no icetime and no PP time.
Then he goes to the World Championships and plays very well against NHLers. (There's a nice clip of him defending Larkin at one point.) He shows more offensive upside at the WC, so now some of the scouts who were doubting the Div 1 WJC thing are rethinking their position on it. They're thinking: if Seider has more offense than we thought, he could be a very high end prospect, because he already had everything else.
And so that's how his stock went from good but not great to through the roof.
I think how it went is this: Seider started off the year in Mannheim, but wasn't getting to play much. Scouts sometimes couldn't even see him because he would be scratched or played like 8 minutes that game. Then he went off to the Div 1 WJC and absolutely destroyed it. He was the best defenseman, second in total points just 1 point behind Dominik Bokk (the first round pick, I might add). Scouts were kind of like: "Hmm. That's intriguing, but it's not a very high level of play."
Then over the remainder of the year, Seider got a little more icetime in Mannheim and did very well. Yeah, he only put up 6 points, but his average icetime was supposedly like 12 min a game at the end of the year... and he didn't play on the power play at all. Somewhere in there, he goes to the combine and dazzles GMs with his interviews. (Also a very high VO2max, which is one of the best predictors of playing pro games.) He goes back to Mannheim, plays well en route to winning the DEL championship. 5 points in 14 games, which isn't great, but, again, he's getting almost no icetime and no PP time.
Then he goes to the World Championships and plays very well against NHLers. (There's a nice clip of him defending Larkin at one point.) He shows more offensive upside at the WC, so now some of the scouts who were doubting the Div 1 WJC thing are rethinking their position on it. They're thinking: if Seider has more offense than we thought, he could be a very high end prospect, because he already had everything else.
And so that's how his stock went from good but not great to through the roof.