Now that's a belter of an image Stu, perfect angle and love the low aspect. Think you could afford to come in a tad on the sides and I wonder if a portrait version would have been better, so 50/50 for me. Looking at the techs you were already at ISO6400, but if this youngster got any closer you would struggle with your DoF, pre-set to f/8 worry about the ISO later, but here the DoF has worked in your favour.
I feel you could loose the Blue and go greyer in the horizon, perhaps darker in the FG to bring some tonal difference and pop some Sat in the eyes & ears, but that's me being a bit artistic , however I do think you are a tad conservative on the sharpening. Might loose the leaf LHS?
Stu, this is excellent work, pour yourself a wee tot!