The problem came about due to the fact people would pull wall to wall back when the game first came out and would do all in their power to ignore deviating from the main path in order to complete the dungeon as fast as possible. The dev team, in their infinite wisdom, decided to play into that by making all dungeons over time essentially a glorified hallway with a sprinkle of trash mobs here and there.
The dev team has a very bad habit of appealing to parts of the playerbase that try to do everything in their power to make things as monotonously efficient and sterile as humanly possible.
I really wish fun came first before efficiency more often when it came to all content in this game, period. :(
