This and FFXI are the only games I've seen where everyone insists tehy have to be able to experience everything. Lots of games have events that come and go. I know a few games where big scary monsters are almost impossible, but when you kill them, they do not ever respawn again (though new monnsters eventually take their place). I personally find it exciting when I'm able to change something about the game world, or experience a spontaneous evemt. It makes the world feel more alive and like you're in it. If that doesn't sound appealing to you, you're probably playing the wrong game. I imagine even after 2.0 comes out there are going to be spontaneous, lore-changing events.