It seems the Arthas-centered Lorewalking that arrived with the patch today had some heavier hitting enemies than intended. Some players were having trouble in the Halls of Reflection and it seems there was an issue causing the increased difficulty, which is being fixed.
Hello Doubletee! We’re currently working on fixing an issue that’s causing the enemies in Halls of Reflection Lorewalking to be too difficult. Don’t fret, they won’t be staying that difficult. 
