As some of you may recall, I had the pleasure of chatting with Ron Moore not long ago (sorry, tusiaczek87, I wore the #FameWhore title that day). I had been spewing my theory about the finale both here and on Twitter that very day so decided to run it by him.
[Spoiler (click to open)]
That Claire's voiceover the entire season had merely been her relating her story to Roger and Bree in the 1960's. The episode would end with her sitting with Roger and Bree in the manse, finishing her tale.
Ron told me that this was the original ending he wrote for the finale, but that he had to change it. I didn't learn why he had to change it and he made me promise not to reveal his original ending until after the episode aired. Well, Sassies, it has aired and now I bequeath you the fruit of my interrogation skills!!
If you ever read this Ron...let's just say great minds think alike.