Originally Posted by
Blizzard Entertainment
We’ll also be doing away with the wing-based queue system currently used in Flex. While Raid Finder offers a flat difficulty—each boss is approximately as difficult as every other boss in the raid—Normal mode is intended to be a more standard, escalating progression. We saw some frustration in Siege of Orgrimmar as people would jump into the later wings of Flex as they unlocked and not understand why the bosses were so much harder, expecting it to work like Raid Finder. With this new structure, only Raid Finder will have wings to queue for. The new Normal and Heroic scalable difficulties will still require you to go to the raid entrance, zone in, start at the first boss, and progress as far as you can in that week.