As for Lafrenière Vs Byfield...
It's not clearcut to me that Lafrenière is going to be better than Byfield for one simple reason: Lafrenière's 10 months older. A year ago, Lafrenière was in the exact same spot as Byfield was in the 2019 WJC: He was a depth forward who, when he was on the ice, had a minimal impact.
What makes it really hard to evaluate between those two is that age difference. It's almost to a point that you have to evaluate Lafrenière from a year ago to Byfield this year, but even then, that isn't quite fair either. And if I had to say who's better between the two in that example, I'd take Byfield.
Someone argued with me that it was "obvious" that Lafrenière is better and will be going #1. I think that, more likely than not, he will be taken #1 overall. But I'm sorry, but unless you're watching a Crosby/McDavid-esque player, there is nothing obvious about evaluating 18 year old hockey players. Too many variables to take into consideration.