Very nice shot. I would ever so slightly take down the brightness of the sky on the horizon where the rocks meet the sky and open up the shadows a tiny bit in the foreground. I think those adjustments would balance it out a bit more. Just my opinion.
@Wolfman - Interestingly enough I've ended up doing the exact opposite.
"Sky" attached is the previous dark exposure. "Foreground" attached is a current light exposure. Same 6 shot stitch, just different processing for the two areas... and one of the reasons I no longer use GND filters.
I've been working slowly towards what I think of as "from the eye" processing. Our eyes can see something like 20 stops of dynamic range. To get that kind of range in a photo I need the brights as high as possible without blowing out, and darks as dark as possible while retaining detail. So I brightened up the sky to allow it to match better with a light foreground. As you can see with that type of sky, the foreground would have to be very dark to match.
I also took out the blue saturation in the sky and evened out the color warmth a bit to adjust for realistic color. One of the biggest problems is converting to JPG, which dramatically shifts color, so I spent a lot of time working on calibrating the color shift. I also brought in some orton, and color soft light to accent edges that would have caught the light. As we might see "from the eye"