A hot take: I'm glad the NHL is calling more penalties so far on those slashes. Just need to remove more of the interference come playoff time and it'll be even better.
The league needs to do a better job at protecting the star players. It's the one league that lags far behind the others in that regard.
NHL is still (still!) an old boys club and a lot of those guys played back in the day when the thought was if you couldn't fight through a bunch of slashes and hooking and a concussion or too then you were soft and not a real star. Hockey has its rep as a rough and tumble sport that somehow supersedes even that of US football. Change is slow.
While the penalties are really annoying at the moment, I think the purpose is to show teams and players the direction the league wants things to go while the games are meaningless. Might even carry over into the regular season a bit but players will adjust and penalties will go down (and I wouldn't be surprised to see refs loosen things up a bit as well).
I think interference, especially on dumpins, is here to stay though because players complained long and hard about that one when it came to defensemen getting lit up while trying to retrieve pucks