The Canadiens' shot attempt differential at 5-on-5 has been increasing steadily the past four seasons, from minus-455 in 2013-14 (26th in NHL), minus-214 in 2014-15 (23rd), plus-233 in 2015-16 (10th), to plus-363 last season, which was third.
The overhauled defense is the key factor in whether this trend will continue. Of the 15 defensemen to play at least one game with the Canadiens in 2015-16, only Jeff Petry remains on the NHL roster. Two key additions have been Shea Weber, who was acquired in a trade with the Nashville Predators on June 29, 2016 for P.K. Subban, and Karl Alzner, who was signed as a free agent July 1.
Weber and Alzner bring many positive qualities but are not known for their shot-based metrics. During the past three seasons, Nashville and Montreal have been responsible for 51.15 percent of 5-on-5 shot attempts when Weber has been on the ice, and 53.95 percent when he hasn't, for a relative SAT of minus-2.8 percent that ranks 236th of the 316 defensemen to play at least 20 games during that span. Alzner ranks 253rd at minus-3.1 percent.