Here are the approx. areas that are problematic. Some parts of them are caused by the source files not being in focus, but there are definitely areas which do have a sharper source file available and HF not selecting it. I've applied touchups to this stack before.

I have a common problem with HF, that it very reliably fails to choose the image that is in focus for the edges of objects.The problem is very pronounced with bright edges (example stack download), but with darker edges HF also chooses non optimal source files for the edges (not as sharp as the ...