Between GMs and coaches, will be interesting to see what owners opt to do. Contracts may play a big role in all this:
GM - NY Rangers have an opening. Any of Buf, NJ, Van, Cal, Ana could consider a change. Buf is still a mess. NJ, have they committed to Fitzgerald as their GM? Van, Benning has mismanaged their cap. Cal, Tre has gone through 5 HC now without playoff success. Ana, worst offense in the NHL this past season and a 3rd consecutive non-playoff appearance.
Coaches - CBS, SEA, AZ are open. Buffalo has an Interim HC. NYR, could move off Quinn if new GM Drury wants to.
In Van, Green doesn't have a contract for 21-22 season, so easily replaced. Anaheim could if they let Murray go. Think Ruff as a veteran stays on with NJ. Sutter got the full time job, but never know in Calgary.
And of course, playoff failure for some teams will lead to changes.