As the subject says, the dungeon Story and Explorable Modes really should be unlinked.
There are a LOT of us who do not have even the slightest interest in Destiny’s Edge and being forced through their storyline on every character in order to play the dungeons just sucks (even just once is too much, frankly, especially since you have to sit through “A Fragile Peace” first in order to remind you just how boring and uninteresting their squabbling is), and there is no real reason why we shouldn’t be allowed to skip it (anything “important” to understanding the Explorable Mode stories can be covered with a simple “Destiny’s Edge was through here and…” in an intro text panel).