We have never "let the players stand around with impunity". That's just a lazy false narrative, made by people who don't understand that there is more than one way to defend and protect the net front. We allow more rebound shots now, and have all season. We allow the 8th most shots in general, and the 12th most high danger shots, so we're not really minimizing those either. There are aspects of defensive play that we are better at now, like shot blocking, but that has come at the cost of a lot of the other things that make up effective defensive play. We have dropped to 22nd in the league in overall defensive results.
There's nothing about the way we are playing that is inherently more successful in the playoffs. Some people have just been fooled into thinking there's only one way to be successful in the playoffs.