First of all, I must just say this is a beautiful shot so even though i have pimped it very slightly, I love the original as well.
My only concern in the shot was that the shadow bottom left gives way to a bright area in the bottom left corner which pulls the eye down slightly. I have therefore cropped it just a touch to take out the 'half tree' on the left and to get rid of the lighter area at the bottom. This has moved the platform over slightly which I prefer and I added a VERY minor S-curve to just push the contrast very minimally.
Beautiful picture Mark, well done.
Cheers,
Rob