It is not a coincidence that the Toronto Maple Leafs have won these games while employing a new set of lines.
By adding Kasperi Kapanen and Travis Dermott into the lineup in exchange for Matt Martin and Roman Polak, the Leafs are way, way faster. By giving non-fourth line minutes to Connor Brown: Way faster. Even when Holl came in for Hainsey: way faster.
Speed kills.
The Leafs were already arguably the fastest team in the NHL. Their slowest players are probably Polak, Hainsey and Martin, and with the kids in the lineup, you can really see the difference.