|Billy Keikeya Dies|
In all seriousness, though, Billy could have been one of the Final Five, which would have fucked with Roslin's head SO. HARD. She considers him to be the closest thing to family that she has, and he's been with her the entire time, even before she became the president. His being a Final Five would also have better explained Dee's eventual suicide after finding the nuked Earth; she truly had lost everything: the man she loved was one of the enemy, and the hope of finding the mythical planet was just a pipe dream. She wouldn't have been able to just have one last pleasant night to hold onto; like Gina in "Resurrection Ship," she would have just wanted to die, to end her suffering.
And then! (Let me continue on my speculation here, guys) Dee turns out to be one of the Final Five, instead of Ellen, and resurrects after her suicide. As much as I loved the character of Ellen, having her be one of the Final Five kinds of removes any of the meaning behind her death in "Exodus." But with Dee, whose personality wouldn't have to change, she could have easily fallen into the role as a mother figure to the Cylons. Her and Billy's attraction could have been explained by their past relationship, much like Tigh and Ellen back on Earth, and all things would have been right in the world. Instead, Billy dies, Dee marries Lee, Dee kills herself, and Tory Foster lives. Frak me.