What are you talking about? Legion added MUCH more than they announced.
Oh, nothing. I'm just a bitter former WoW player who really enjoyed the game's aerial combat, the underwater raid and the Path of the Titans progression system...
Granted Blizz has gotten better by simply promising less, in the past the game boxes had screenshots of features on them that didn't make it into the game.
Those seem minor to me. Not just for WoW (WoD infamously got cut in half and redesigned) but for games in general. Minigames and glyphs-under-a-different-name aren't much compared to the stuff most devs pull, especially since cut stuff is generally compensated for i.e. Abyssal Maw/Firelands raids being consolidated into a larger Firelands Raid. Certainly not enough to hold a Molyneux style grudge IMO. Saying you quit Pandaland after launch because of it makes little sense to me because that had the best post-launch support of all expansions, at least up until WoD got delayed. Now, if you'd experienced WoD... Then I'd get it.