I don't know about this. Maybe they got some picks wrong (I'd certainly agree with that), but I wouldn't call these legacy picks. The only guys to play in a best on best tournament for Team Canada in the past are Crosby, Marchand and Doughty and each of those are still good enough to not be ridiculous picks.
Even including the Team North America guys, it just adds McDavid, MacKinnon, Makar and Parayko, 3 of which are automatics and if they were concerned about bringing in those guys then Shiefele would also be there.
I think they've picked certain players for the wrong reasons worrying about balance vs. picking just the best players, but not because of them being legacy picks.