I don't think they save two roster spots for Sudbury players, especially a 16 year old. Byfield is still in play, but I wouldn't think its a lock. One, it depends on Ice Dogs and Oshawa advancing in a timely manner to get the next series (and to create the Ottawa/Wolves match-up), and I can also see Lukonen stealing a game or two.This IIHF U18 tournament is for the hard core prospect watchers and pro scouts. It's not a priority for hockey fans because Hockey Canada/CHL do not see it as a priority tournament.
I'd probably leave a roster spot open for Byfield. i doubt Sudbury survives for long v the '67s. depending on the first few games of that series go, I would probably leave 2 spots open Byfield/Murray.
I would think the saved spots will be primarily focused on Dach, Cozens, Lafreniere, and Byram. Now, some of those guys could advance to round 3 (as it's unlikely all 4 get knocked out), but, I would think those who the primary saved spots are for. But, if some of those guys advance it may open some up for the next tier of guys. Dach and Lafreniere are through, but Dach is likely out next round. Byram is on a one seed in a side 2-2 series, and Cozens team is a 4 seed and is up 2-1. I really can't see a spot being kept open for Murray. If they go out in 4, he might get in, but I don't think Hockey Canada is a fan (they cut him from Hlinka) and he didn't have a great season.