Like you, i am having the same feeling. I'm losing my mojo for WoW.
The worst thing is that is impossible to talk shit about Legion because is the best expansion since WotlK.
I simply out-grown/got tired of the same formula.
What i am doing right now (because my PC broke and is repairing) is playing Dragon Quest VII for the N3DS.
It's a 100 hour campaign + side quests with 30 classes to level up and chose from.
When i get my computer back...i'm not sure if i will resub.
I got old, the game is geting old. I need new stuff. Thats why i am always asking for inovation from Blizzard.
But they simply polish the game and make it shiny. I'm just tired of it and i guess i just have to move on and play other stuff
*cry*