“We have a rule,” said Colorado GM Joe Sakic, per USA Today. “We’ve had it forever. In my mind, you don’t have to change anything. It is what it is: puck’s got to get over the blue line. Video review is there for a reason and it’s working. You grow up as a kid and you know the rule, and it is what it is.”
One proposal discussed was changing the rule to allow the blue line to expand to the plane of the blue line. In other words, it would be similar to the NFL touchdown standard. If a player’s skate was above the blue line, he would be considered as touching the blue line.
http://nhl.nbcsports.com/2017/03/07/...e-wont-change/