With Patch 7.1.5 next week, we will be able to complete Order Hall researches faster.
This is part of Blizzards adjustments to make a catch-up for alts and new / returning players more convenient. You need to do those Class Order Hall researches to increase the amount of Legendaries you can equip up to two. Until now, it almost took 40 days to reach that last trait.
Yep! We'll be reducing the time it takes to complete Order Hall research in Patch 7.1.5. https://t.co/VKiJ3HDBrv
— WarcraftDevs (@WarcraftDevs) January 7, 2017