As for the "dramatic underpinnings of her story" I guess that will rely a lot upon what she does going forward, i.e. searching for Claire or just mooning over Sawyer.
I actually hope she does a lot of the former and a little of the latter. She finally has some fucking motivation other than running from whatever nebulous problems are haunting her.
She's pretty much defined by her relationships with Jack and Sawyer so I wanna see that start to pay off for Christ's sake. Also, was she just feeding Mrs. Littleton some bullshit when she said she was going back for Claire? I hope not. I hope that becomes her mission. That would make her infinitely more interesting than she has been.