Again with the trying to compare a RPG game to an MMO? Obviously you don't have nearly the investment that most players of WoW do. You quit EQ2 to go to a different MMO. Then that MMO to go to WoW. Then you Quit WoW. It is vastly different when you quit, then when you are being forced to quit because they are making a game with the same name, same theme, same everything pretty much, but you lose everything you already did.
Its not hard to believe people quit. However, its obviously hard for you to understand why people would be mad in a situation where they still had no intentions of quitting.