So let me get this straight… We take a dash of Metro 2033, a pinch of some totalitarian Stable-Tec run on a giant gulp of FEV and bake it in a MLP pastel Havai oven... It sounds awesome, really really awesome, but it does also sound a bit too much for my tastebuds, a few too many new factors gets introduced in this exposition dump that make me scratch my head and wonder why it is based on FoE and not are its own original entity since it sounds like it want to be its own little thing.

Ohh and underwater metro tunnels in a post apocalyptic setting, in an area of the world with a shitton of volcano activity, that have been bombed to hell and back by the closest thing that you can find to magical nukes… I really like the idea, I really do, but my suspension of disbelief can only be stretched so far before tension marks begin showing in it.

Walking spark batteries ... Now I want to get a glowing one and on of these guys and see if we can make perpetual energy lol

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I'm just glad I'm not the only one who recognized the Metro side of this.