The NHL will allow clubs to suspend any unvaccinated player, unpaid for any days missed to quarantine, and travel restrictions. Unless they test positive or for a religious or medical exemption.
With Canada and the United States, changing protocols I doubt fewer players will be affected as they were before, however, there still is a quarantine protocol between the US-Canada border.
In following maintaining health protocols, after isolation, players will be given a cardiac test. After Brandon Sutter's chronic illness, I imagine they're trying to catch it before it starts.