EoTM wasn’t designed to take people away from WvW. It was designed as a WvW map that players could play in when the borderlands and EB were full. Obviously if you aren’t in a heavily populated server then you won’t see the effects of that, but for a lot of people this is a very welcome map.
As to lasting effects on the world – did you not get the memo that Lions Arch is being destroyed? Did you somehow miss all of the changes that each living story update has brought? How the story is progressing?
If you want to complain then be constructive about it, tell us what specifically you don’t like and why you don’t like it – and how it could be improved.