I have downloaded a trial of Nik Software's latest version of Pro Sharpener 3 to give it.. well a trial !
I guess that the bottom line is that Sharpening is subjective and everyone has different views.
However, I would appreciate any observations, in particular
1) The texture of the stonework, is there too much much detail. ( Structure Slider)
2) The edges ( Local Contrast Slider)
3) Overall effect ( Adaptive Slider ... I think ! )
I still have 10 days left of the trail and have, therefore, a few days left to try out any suggestions you may have.
Just for the record this was taken at March's epz Bodiam meet and it was the series of arches that caught my eye.