The sky does look a tad overcooked, but comparing it against the raw files, not a lot in fact. I didn't increase the saturation at all, it's just the contrast adjustment that's the culprit here.
The near foreground was deliberate - there wasn't much of it, and what there wasn't particularly interesting. Besides, I wanted that sense of the ridge just dropping away. Once I'd done that, and wanting to keep the camera straight on to make stitching easier, the amount of sky was a given - fixed lens X100s has its limitations.
Anyway, here's a B&W version, with the sky cropped a bit.