Looking at it a bit more closely (and remembering things better), the surrounding shots are actually all from his 97 release, too. But the sequence in question just happens to be unmodified from his 97 version. So, there shouldn’t really be a difference in sharpness that needs to be corrected for those specific shots. Which also partially answers your other question. The Blu-ray could be used, but I thought Harmy’s take on it looked good. Going to the BD, I would need to match it to the earlier shots from the Ben+Luke scene, which I slightly modified from Harmy’s.

I glanced at the blu-ray, without doing a proper comparison or loading it into editing software, and it doesn’t have the super sharp (almost grainier) look of 2.5. But again, I’m not sure why or how 2.5 is that way. If there’s an issue with the 97 edit, it’s either specific to those few shots or you’re only noticing it there. An enormous chunk of 2.7 uses the 97 edit, more than just a shot here or there. Seems more likely to be something notable about 2.5.