I wonder about a slight crop from the sky and right side; or alternatively from the bottom and right side? Otherwise this looks good to me.
I think it works well. If anything, suggest darkening the light rock in the foreground just a bit so it blends better with the rest of the f/g.
Yes, a slight left side crop would also work. It is just that at the moment the sky and foreground seem to have equal importance so they are 'competing with each other' for importance. In colour, one of them would probably be obviously the most important.
Nice shot.
That edit looks good to me.