There is no benefit to storing the emissary bags until after the patch. Note: Emissary bags earned before 7.3.5 will still give the number of essences from before 7.3.5.
The average time taken to purchase a token will remain roughly the same, but this will minimize the benefits of accumulating essences early.
We've released a live fix that causes Awakening Essences to drop for everyone, regardless of whether or not they have the mission.A few additional details on the new Legendary token:
