Maybe I'm parsing words too much, but I don't see this pick as being way off board. Seider was a solid first round pick according to consensus. He was the 6th ranked European skater in the final rankings, and some talent evaluators had him pegged as the second best D prospect in the draft behind Byram.
Yzerman could probably have traded down a bit and still gotten him, but it is not like this was a second round or later player that we way overreached for. I'd say we went a little off board, nothing worse. In a perfect world, Yzerman would have traded down into the 10-15 range and grabbed Seider more where his stock had him. Apparently there wasn't a worthwhile deal, though. I read that Yzerman did attempt to move down.
What I will say is this feels, at least to me, very much like a need pick rather than a value one / BPA strategy. Maybe in Yzerman's eyes Seider was a top 5 talent in this draft and he was the BPA. I'm skeptical of that idea. I kind of think the fact that our pool of young forwards is deeper than our pool of D prospects played a much bigger part than Yzerman let on. I had pretty much concluded in my mind prior to the draft lottery that if we didn't get first or second overall then we'd probably be better off going D, because while the forward prospects were considered solid none of them are guaranteed difference makers. So, if we are going to have to settle then we may as well go for the option where the reward is better, and that's landing a possible future top pair D. Worst case scenario is we have a big, mobile right shooting D who can probably play on the third pairing.