Burning Crusade Classic is being rolled out in five distinct phases. These phases allow players to re-discover the content of the game little by little, while limiting how much the more elite players can rush through it.
Using patch 2.4.3, the differences between Burning Crusade Classic and the version of ten years ago are minimal, and have absolutely no impact on the gameplay -- which was Blizzard's main intention.
The only major difference is that raid and dungeon bosses are in their pre-nerf versions, not in the state when the original Patch 2.4.3 was deployed!
