The coach is aware of the players chosen to close out games. If known capable players are benched so incompetent players are iced, then that is a systematic choice. We may be splitting hairs, as it all leads back to the coach, who makes the decisions on which players compete at a given moment, and the general structure those players are to use. "Hakshell" is more of a system change, in that the Flyers are often successful when they are more aggressive, and unsuccessful when passive. Choosing to be passive is a system the coach utilizes to protect leads. It all comes back to the comments made by Alexi Kovalev, coaches are ruining the game by teaching fear. Watching a game, it's easy to see when the players have a green light (often when they're winning, and not a game stolen by a goalie- the win over VGK is an example of a fluke win), and a red light (pick a time the Bruins tied a late game, and usually won in OT, end of season game excluded by fortune).