I'm 50/50 on the lack of action sky in color, but in B&W, with that much sky, I would probably add something to it. Perhaps a slight gradient going from nothing to 1 stop darker at the top? I do that a lot to help lead the viewer's eye down the sky into the mountains. You'll have to play a bit to find just the right amount of gradient.
Also, both pictures are awesome, and make me miss real mountains.....