Reinhart is one of the best wingers in the world, Hagel is a good third banana. Hagel has been fine but I do not see a potential difference maker on a team that is lacking those. On a team short of upside I think the team should give Reinhart the opportunity to figure it out unless he ends up being a liability. It's nice that Hagel held his own in allowing the Tkachuks to cosplay as the bash brothers, but it doesn't make him a lock for the roster. It also isn't a case like with Marner where stylistically Reinhart doesn't fit what Canada is doing. I'd sit Hagel or maybe Marchand, though if Canada gets to a championship game in Boston I'd probably rather Marchand play. Of course the team still needs to beat Finland, which is not a given.
I'll add that Canada needs to take the lesson from this event that the team needs more cannons on the back end. Every team has been successful in forcing the opposition to lob shots from the blue line too often. Makar is probably the best possible defenceman in that situation, but he's really the only good one that this team has for that situation. I am not a fan of Bouchard but offensively he would have been an asset last night (and likely a defensive liability as well). I am hopeful that Dobson can find his form next season leading up to the Olympics.