Actually, the fact that we already know exactly what happens to her highlights one of the very serious writing problems she exhibits. With the ending being a foregone conclusion, there is absolutely no potential for character development whatsoever. Nothing she does can ever have any real impact or meaning or make her believably matter. In a way, it seems to me that he on some level knows that already, and is content to just leave her as a caricature: since whatever she has done to be important is supposed to have 'already happened' in the future, we're just supposed to take her word for it that we should actually care? Puh-lease! It's such a cheat from a writing standpoint, a complete cop-out on making any effort for her to seem like a real person. Moreover, it's a cheap gag that breaks the fundamental rule of 'show don't tell'.

Even if her smugness didn't make her infuriatingly obnoxious, I would still call rubbish. We're really supposed to believe she's The Doctor's ideal woman or whatever the hell just got crammed down the viewers' throats? Excuse me while I go watch a show that actually bothers to give its women some semblance of personality . . .