I think Natalie has an excellent position in the game because she managed to find two different advantages on EoE, which translated into about 14 fire tokens, which she turned into three advantages in the challenge to get back in the game next week, as well as a jar of peanut butter and an idol (or maybe she found the idol at some point, I don't recall).
Remember that on EoE it's a miserable existence - no real shelter, very minimal food / shade / water, and they have the option to quit at any time.
But, in order to win from EoE, she has to win the challenge to get back in, which means she'll have to beat the other ~12 players on EoE in the challenge. Then she'll have a big target on her back because all the other remaining players in the game will realize they can't win against her in the jury vote, so she'll have to win the final immunity challenge to prevent that. Then she has to convince the jury, which will probably give it to her, especially if she pulls a Rick Devins (?) and gives her final immunity away and then wins back into final three via the fire-making challenge.
I think the producers are going to re-think the fire token aspect to the game. It's new, and adds a lot of complexity to the game, but it may also distort what they're going for. I think in general they may be going to far with complexity - all the variety of idols (50/50, safety without power, disadvantages for other players), EoE, commerce between two sites and donations to other players and loans via fire tokens. It'll be interesting to see how they proceed in future seasons with the game complexity, maybe even more so than the players and the game itself.