This snippet from the Sep 11 Patch Notes:

-Changes have been made to the behavior and mechanics of the enemies found within the “The Wanderer’s Palace” and “Amdapor Keep” dungeons to counteract instances of players running through the dungeon without engaging enemies on the way to bosses.
As advancing through dungeons without defeating enemies is not an intended strategy, we plan to continue making further changes in the future to discourage this type of behavior.


I guess that means all the people who were adamant that speed runs were a sign of elite gameplay will be sad now?

Well done SE. I'll live with the fact it's going to take some time to complete the whole game