In all transparency and disclosure unless things with gear change to a more simplistic model, I'm leaning towards quitting WoW after Legion. Its largely all from the gearing and amount of gear in Legion. Seriously, there is way to many ways to gear - dungeons, LFR's, Norms, Hero, Mythic, Mythic +, Nethershards for 880 gear, Crafting Legendaries, Obliterum 10/10 and notice in that list, I never said the random Legendary drops, oh, and World Bosses...
At least for this player, its over-the-top and ridiculous. I literally had a friend buy a 100, spend a day leveling, bought enough gear and ran some dungeons, did the Invasions, hit 850, went through Norm EN, Hero EN - used 6 bonus rolls, got 3 more today, sold a wow token for 100k, bought three crafted pieces 8/8 obliterum, got into a Heroic NH and was done with AoTC in 2.5 weeks and is now sitting at 904 on his Mage and bored. Oh, and I have played since launch and at 907.
I just wanted to make some suggestions and hope things will be better, but, I'll likely be done with WoW unless it drastically changes following Legion. IMO, bring back Guild Achieves, remove the legendary ridiculousness and remove about 4 other ways to gear and get rid of Class Halls, Missions for Followers, and Garrisons, nothing more social then everyone in the city. Oh, I guess Missions are okay. just my opinion. Good Luck.