You really think WPvP was the only reason flying was removed? You are sadly mistaken if you think that. WPvP was only one of many reasons, and it wasn’t even at the top of the list either. The number one reason that flying was because it is easier to design a world without it. Flying enables players to simply bypass large swaths of content, which is anything but a good thing for the longevity of the game. That pack of enemies in the middle of the only path to your quest objective that have a stealth detector means nothing when you can just fly over them and land safely on the other side. The tower full of enemies you must fight your way up to reach an objective at the top, trivial when you can simply fly to the top. Ground based obstacles are meaningless when flight is added to the equation, and areal obstacles are either ineffective or too effective, there is no inbetween.