The fans have become knowledgeable in all facets of the game, including the officiating with the ease of learning tools such as the Internet and You-Tube. The referees should be learning the nuances of the NHL counterparts in the AHL for at least 4-6yrs. Before plying their trade as linesmen in the NHL for a couple of yrs. and a review board should be in place to ensure the quality of the decisions made and the effect of poor decisions on the final outcomes.
Hockey is a business after all is said and done, but the odd PP in favor of the home team probably doesn't hurt their product's sales at all. This has been part of keeping a level playing field for as long as I can remember. Being a Hab fan during the decades when the Habs were head and shoulders above their competition. It must have been a mandate to penalize the Habs regularly during the game, to ensure the flow of the game was erratic and the Habs couldn't get any continuity in pressure.
The Habs of the 1950's were a powerhouse and two minute minors were served regardless how often the opponent scored. Montreal with it's talent, could put a game out of reach during one PP, scoring 2-3 times in an era of tight defence and great goaltending. The NHL changed the rule to what we now have, due to the Habs strength and IMO if not for the refereeing and Clarence Campbell, the Habs may have won eight in a row in the 50's.
The expansion in 1967, doubled the existing Original Six to a dozen and the refereeing wasn't one of the major concerns, insuring the financial success of the new franchises was. The officiating has always been a pain in the backside for fans of NHL teams, it appears the league is nearing parity for the first time since the 60's IMO. Now would be the appropriate time to form a Program specifically designed to teach refereeing, much like the Team Canada's Program of Excellence for teenage players.
A program whose aim is directed towards teaching the same group of rules for participants from each country, with clear outlines (no vague penalties left for interpretation). This would instantly leave the game in the players hands and take out the intimidation tactics used by some coaches. (Freddy the Fog, Broad Street Bullies eg)
Only by putting the sport back in the players hands, does it insure the quality of play the fans enjoy instead of what the Owners & IIHF want to ensure the big payday.