I would be very interested to know how you came to that conclusion for Reinbacher. His biggest strengths are by far his gap control vs attackers, defensive positioning in the slot, skating and first pass. What he needs to work on is his stick work (which isn't that bad for a 19 years old) and use his body to protect the puck better on 1 on 1 battles. He was +6 on a team that went 4-7 in the last stretch and -16 in goal diff in that span. Very small sample size but he made a difference for Laval when he was on the ice. His skating is also above average so I'm not exactly sure what's the problem here.
I do agree that he should project in the 40-50 points on average in his prime. I don't think anyone expects him to become an offensive dynamo but his puck retrivial skill, skating, first pass and ability to eat a tons of minutes should make him a prime candidate for a first pair on a contender. Think prime Devon Toews but a bit bigger and stronger.
He also doesn't need to put up 65-75 points a year to be a #1 D. Look at a guy like Pietrangelo. He never had more than 54 points in a season yet he's a very solid #1 D and is able to play in all situations. Prime Reinbacher should be able to have the same kind of impact on a game/playoff series and that is more valuable to me than an elite winger who can put up 85-90 points - or at least much, much harder to find.
Gap control isn’t the same as positioning against the cycling.
His skating isn’t on the level with Heiskanen, Hughes(x2), Simashev, Sanderson etc. And he looks less mobile than Nemec on the shorter distances. So like I said - good but not great. I think Toews is better skater.
First pass isn’t the same as playmaking and decision making on the blue line in O zone cycling. And like I said I Didn’t decided yet what I thinking about this aspect, I saw as very good as not so great moments. For teenager in a good league it could be a growing process.
Puck protection against adult competition is a thing he will fix I believe. It’s more natural to develop.
So even from your words you are mentioning Pietro as his best case scenario . I don’t think Toews is more valuable than 1ppg+ winger. And I don’t think that Pietro is more valuable than 100+ points players. Offensive creators of this level is not just foundation- they are faces of franchises and league overall.