Out of curiosity, are you suggesting that Soucy was attempting to cross check McDavid in the face?
I've watched the video a multitude of times, and I just don't see how someone could support that. You can make a case that Soucy should always be in control of his actions, or that he should pay for it despite it being an accident, etc. But in reviewing the action, the intent seems to be that he was trying to cross check him in the chest..
With that said, players get suspended for accidental contact with the head all of the time. Most hits to the head are not on purpose, they often result from a player reaching for a puck and lowering their head, or turning their body in some way, and the angle of the hit changes in such a way that contact is made with the player's head. The league still considers them to be acts worthy of suspension. But I don't know, this just feels different to me then that... You can call it a bias if you want, but I see the cross check to the face as more of an unfortunate accident that involved the actions of three players (Zadorov, Soucy, McDavid) in an after the whistle scrum. If it happened in game I definitely see it as a penalty, but I don't think I see it as a suspension.