Hi Rich,
I too like the composition
A look at the detailed EXIF reveals a few factors;
It was shot RAW, but does not seem to have been post processed beyond the default "0" settings in Adobe Camera RAW (ACR)
It was uploaded at such a large size that TinyPic has applied its size limitation (which softens pics)
There is a conflict of metadata tags and the embedded colour profile (aRGB vs sRGB)
You may prefer to differ, but I suggest that clicking the shutter is only the first half of the photography process, all shots need post processing, especially when shooting RAW, which bypasses many of the adjustments applied in camera by their jpg image algorithm. Not that I want to start a discussion on that ole chestnut.
I believe it would benefit (initially in ACR) from:
Up to a stop more exposure (I note you did apply "+ 1/3" when shooting)
A better Black point setting (as Geoff suggests)
Application of
Local Contrast Enhancement (LCE)
As the sun is shining (although somewhat weakly), perhaps a slight warming of the colour temperature
Then, in Photoshop ...
Save full size
Downsizing to 1200 x 800
Application of UnSharp Mask with following settings: Amount 120%, Radius 0.3px, Threshold 1
Save, with a different filename, this smaller size
Fancy trying it Rich?
I could try most of that on this jpg, but it won't look as good as if you do it from the RAW original.
Hope that helps, Dave