First of all, appreciate the words pal!
So, I've experienced issues with blender many times in the past (when importing my own models), can you maybe send me an image on discord so I can check it? Will dig into it later on since I'm in the process of updating other sets as well (so would be cool if I was able to fix the issue now and maybe apply the fix to the rest too).
The issue regarding the missing textures, what texture is exactly missing? Due to the way I manage files for every set, I have a blender folder for each, along with a separate export folder (with every subfolder you see inside the zip), I try to copy files from one place to another, sometimes in a clean way depending the case, maybe I somehow missed a texture?
Thanks again, specially for telling me about the issue so I can work on it asap pal! if you prefer you can also send me the image (or just more detailed info) to my email or twitter. (just in case you don't use discord at all)