Fairly certain the last cylon is in the fleet too, we just don't know who it is yet.
Deanna said the fifth is not in the fleet. Heck, the writers didn't even know 100% who it was last I checked.
What are you talking about? They were instrumental in helping Starbuck realise how to find Earth.
In a sense. I wouldn't ever call them useful, important or powerful, though. There's absolutely no differentiating them from humans, and it really better be expanded in the next 'season'.
No, it was to force the cylons to confront the concept of mortality. When they did, they became very similar to humans indeed. Besides, the final five can't resurrect, as it would make no sense - how can there cloned bodies for them, if the known seven don't even know who they are?
See now you're just making it up for the writers.
Still ten episodes left - it's not over yet. Waiting for them will be the challenge of patience indeed.
Oh, I know. At least the show managed to shrug off some baggage like Gorgon said.