Does anyone else suspect that Miles' statement about Jacob's last thoughts may mean the opposite of what we might think? "Right up until the second the knife went through his heart Jacob was hoping he was wrong about you."
Maybe Jacob's fear was that Ben would be too much of a weasel to kill him, but Jacob wanted him to. I know others have suspected that Jacob planned for Ben to kill him, but this ambiguous statement makes me even more suspicious. I simply can't believe that Jacob was able to orchestrate all he did, only to fatally misjudge Ben. Jacob's business was knowing exactly who people really are. My current guess is that Jacob planned all along for Jack (or another candidate) to replace him -- maybe that is Jacob's loophole.