Why not rename the stable labels from "range.prim." to "range.access.", too? They're range accessors too, after all. [ranges.general] would be left using "range primitives", so maybe update that too (and drive-by mention the adaptors, perhaps).

We're trying to keep stable labels, well... stable. Just because the parent subclause has a different label doesn't mean we need to rename the subordinate labels.

We're trying to keep stable labels, well... stable.

The stable names in question have only been present in a single revision of the WD. It seems reasonable to me to change them.

If you decide to change the stable labels, there are others to consider. The stable names of the non-adaptor CPOs under [range.factories] end in adaptor, rather than factory.