I like the shot a lot Dave - the original better than the panorama because in the original the tracks lead you through the shot from the bottom left corner, whereas in the panorama they uncomfortably disappear in the middle of the frame.
I've noticed on a few of your recent landscapes that they seem to have a yellow tinge which I believe is your WB out of kilter. See the quick edit I made below changing nothing but the WB (if they look right on your monitor and you've PP'd them then I'd think maybe your monitor needs calibrating). I hope you don't mind, not a criticism but just because I'd like to see your beautiful landscapes presented at their best !
I've cooled the WB and now the sky & clouds have a natural grey colour, and the snow on the mountains a natural white, also the river and the gravel next to the rail tracks, without the overall yellowish tinge to the shot.