We should at least give the NHL points for trying.
There were perceived problems from the owners and general managers about goals being improperly allowed or disallowed. With the advent of more and better cameras, the argument went, shouldn't the league take advantage of those to eliminate as much human error as possible?
So as this season rolled around, the league implemented a coach's challenge system where teams could ask for the officials to review potential offside plays and goalie interference. Risking their team's lone timeout, coaches can now send the referees to the penalty box to look at tiny monitors to use the pretty damn ambiguous criteria to look at goalie review and the incredibly objective standards of offside.