I am a big time hockey fan and am a traditionalist, however, I think these new rules need to occur. Let's face it, no one likes hockey and in order to get the casual fan to watch, they need to market it for them.
In the 80s the NBA introduced the 3 point line and people were up in arms, now nobody thinks about it and it is just a part of the game. Same with the 24 second clock.
In baseball they raised the mound after Bob Gibson dominated. People were upset then, but now its just another thing, nobody cares. The DH rule, well I dont think I can say people ignore this part of the game
The point is, in 10 years people won't even remember what it was like before and will enjoy the sport for what it is.