No danger in the open world was for me one of the main reasons to cancel my subscription. When the open world was actually dangeres it was challenging and it felt like a adventure that required some teamwork from time to time. Now all danger is gone (even without heirlooms) there is no sense of adventure anymore, it feels empty and grindy. As a casual gamer leveling was one of my favorite aspects of the game, it was fun meeting new people and helping each other out. Now all of that is gone i have no reason to play WoW anymore because all there is left is raiding and i don't like raiding.
The same goes for dungeons, i remember how valued and important i felt as a mage, keeping my target sheeped to keep the group safe and helping people out with food and drinks. Now you are just a random dps'er, a number, a nobody.