A little line from Saoirse's interview could be interesting:

"You know what? Even if I don’t get it, I had so much fun auditioning, pretending to take out a lightsaber – out of a bag, kind of inspect it and not know what it is. That was… that was great. A lightsaber! Star Wars!”

So, depending on who her character is, it could means that there is no Jedi order in command at the beginning of Episode 7. Because unless she's really cluless, almost everybody in the galaxy shoud know what a what a lightsaber is (if there is some kind of Jedi order).

EDIT: of course this is assuming that her part for the audition have something to do with the final story.