I think the doll in the water, and the rest of the stuff found laying around that waterfall, we just luggage, etc. that came out of that section of the plane. Now, that being said, I have a feeling that there may have been another survivor from that part of the plane. This will come into play later.
Can they all be dead? Oh sure...that sure is a possibility, though that stuff early on about that French radio signal makes me believe that this is more like a Land-of-The-Lost scenario...like a tear in the fabric of reality, or maybe a second parallel dimension.
I know its all for ratings, but was this plane Rosen only survivable for the beautiful and studly?!? Except for that big dude with long hair, we're talking hubba hubba all the way around. "Oooh...I'm so happy I'm beautiful. I feel so badly for my butt-ugly seatmates who didn't make it."
Lastly, and this is an anal-retentive point, but had that plane truly broken up in mid-air that way, there is no way a single person would have survived. But hey...maybe that leads us back to the afterlife/heaven idea.
Good stuff...REALLY good stuff. Can't wait for next week.