I plan on flying once I reach level 80-85, if flying or any other useful abilities are removed from the game, I will stop playing this game. Last time I checked this game is called World of Warcraft, not Burger King Land. I will not continue to pay a monthly fee for a game where flying or other abilities are removed because a few people don't like them.

Edit: As long as this game is Pay to Play:

Do not remove flying

Do not remove certain class abilities that makes each class unique

Do not remove items that give players an advantage over bosses