I’m obviously in a biased position because both incidents involved Sens players, but my primary problem is that they took place after play was called.
Cross checks are going to happen around the net, shoving etc.
But stick work after the whistle blows is dangerous. In Zub’s case, he was completely unsuspecting because he was not even the player involved and was in the act of actually trying to protect Larkin on the ice and had waved the trainer over.
If you’re teaching players that the whistle ends play, you have to reinforce that by penalizing infractions when play is stopped more severely.
I think there’s a certain acceptance that hockey is a physical game but hitting guys with sticks when guys are presumably more vulnerable after the referee has halted play should also very much be against the “code”.