Hazzikostas notes that this addition will make it easier than ever for friends who are playing through expansion content to team up, even if they're not at the exact same level. When players hit the new level cap of 110, they'll be able to unlock access to Suaramar, the expansion's climactic zone and the one that will not have level scaling.
Whatever their level from 100 to 109, the enemies, quests and gear rewards will scale to the player. Players will be able to move between any of the four leveling zones - Azsuna, Val'Sharah, Highmountain and Stormheim - in any order. Hazzikostas refers to this as a 'true open world.' The biggest change in Legion is that rather than sending players along a direct path from zone to zone, this expansion's leveling zones will scale based on the character's level.
The news was revealed by lead designer Ion Hazzikostas during a panel at BlizzCon today. Along with a new playable class and a bunch of new zones, Blizzard is changing the structure of how leveling plays out in the upcoming World of Warcraft: Legion expansion.