With the advent of patch 2.3, the following improvements have been made to leveling within the "Old World":

- The amount of experience needed to gain a level has been reduced for levels 20 to 60. (Please note that experience bars have been converted based on strict percentage.)
- The amount of experience granted by quests has been increased levels 30 to 60. This increase will only apply to Old World quests and not those available in Outland at level 58.
- Level 1 to 60 dungeon quests have had their experience and faction rewards increased.
- Many elite creatures and quests between levels 1 and 60 have been modified to accommodate solo play.