I found the explanation of C-contiguous vs Fortran-contiguous helpful (and I've programmed in both of those languages, though granted not much :).  However, based on that it is not obvious to me why having a fortran-contiguous buffer prevents it from being used in the bytes-like object contexts (though granted the order might be surprising to someone who is not thinking about the memory ordering and just assuming C).

I don't have much of an opinion on the other non-glossary-entry changes, but at a quick read I'm not sure how much clarity they add, if any.