Below is a 100% crop (see more of it by clicking on it) after all the edits - this includes stitching, stretching (Edit-Transform-Warp) and Akvis Enhancer, and gives you an idea of what happens when you manipulate a file like this. There is sharpening in Lightrooom (see below) as well as some additional sharpening in Photoshop before applying Akvis Enhancer (always do the sharpening before the Enhancing).
The clip below is the same sharpening I gave my Nikon D800e images in Lightroom, 58, .7, 70, 0
And below is 80, .7, 50, 0 - as this was shot at f16, more sharpening to compensate for diffraction is reasonable and perhaps a little more might still be ok.
and here we have 101/1/50/0 which goes a bit too far - though you'd neve see it in print.