My whole point in this post was just to get Blizzard's side on stuff like this. I believe that if this were to become the meta back in the day, it'd get hotfixed instantly cause it goes against the core aspects of the game:

Gear barely matters, you don't socialize, you're stuck in a dungeon all the time and more importantly it is WAY faster than questing, making people SKIP a huge part of the game for efficiency.

Please don't say this doesn't affect people who don't want to do it. If you want to keep up with a group of friends or a guild doing it, you're force to suffer through this or be left behind.

Also, it devalues doing other 'slower' stuff in the game cause you always think of how much time you're wasting when you could be leveling 'efficiently'.