He does play on the PK though, right? I would have thought he was at least somewhat responsible defensively. Or is he just there to exploit 1-3-1 powerplays using his speed?
Gauthier is better suited to play the grinding-shutdown role on the 4th line. He's 6'4" which helps as well. On a side note, I noticed that Gauthier has only played in 4 games this year but isn't listed as injured on HockeyDB or EliteProspects. He only has 1 point (a goal) in those 4 games which is pretty underwhelming considering he is in his draft year +2 and the rest of the team has put up a boatload of points.
The projected lineup is including players who are guaranteed to be available for the tournament. The note "Availability to be determined" is part of his article as well. If those players are able to join the WJ squad, you can be sure they will get a spot, which in turn means that someone on that lineup is bumped off.