Yes. Eventually, there will be a regression to the norm. The Rangers are far below the average, but their stats indicate that they should be far better. The more chances they create, the better.
Rangers are tied for 2nd in the league, with decisive wins. A decisive win is a win by more than 2 goals. The Rangers have 21 wins of this nature.
Their strategy isn't ineffective, it just reduces efficiency. Since they're not efficient, this is the next best thing. The more chances they create, the better likelihood they have of pucks going in, even if they aren't efficient in that.
Regression to the mean, doesn't mean it'll happen in the playoffs. If they played 1,000 games maybe they'd regress to the mean, it's within the realm of possibility that the regression doesn't happen in the playoffs. BTW, that decisive win stat is shocking to me, doesn't seem like they get that many of those. Who is #1? Boston?