Well due to all the DLC they give you free pass through Way of the Strong (since Mission Levels basically match). Initially, you had to clear a lot more missions to get to the later regions, but since people complained that it takes too long (you had to clear more than just the main missions for instance), they kept reducing the requirements. You might have to clear more stuff in WotN though… can't remember.
Trying to Pop open that Way Of The Wise to get level 250 Loot.