Blizzard has announced that they will be increasing leveling difficulty tomorrow (August 28th) with it being most noticeable at level 70.
It is entirely intended that effort put into gearing translates into a significant combat advantage at the start of a new expansion, but the values we’ve been seeing are extreme, often not even allowing time for normal combat rotations. This disparity also caused mixed-level groups to experience skewed results, with lower-level players contributing drastically more than level 80s.
Tomorrow, Wednesday, August 28, we’re going to apply hotfixes to the game to address this.
The hotfixes will adjust the scaling of enemies in War Within leveling content to increase the power of lower-level enemies, bringing the duration of combat more in line with expected WoW behavior. These changes will be most noticeable at level 70, and will have a reduced impact as your level increases.