Personally, I think there should be a traitors story-line, where at some point you could rebel against your own faction and join another. It would add a lot more depth into RP'ing, which I suspect A LOT of people would be into in TESO. It would also add another depth, another level to the story of TESO. I think it would be interesting.
I'm also very skeptical about this. A LOT of people would want to become a traitor just to join their friends whilst being in their desired race, which would be a lot of people, completely ignoring the story and RP aspects of the being a "traitor".
What do you guys think?