I'm not exactly sure if it's a good idea or not, but having a p/8 folder would allow for all the other circular primitves that aren't n/16 to be put there for software to use as desired. If p/8 were created, I think Magnus's suggestion of turning the stu2* primitives into moved to files pointing to p/8/stud* makes sense.
If you want to have some idea of what effect this would have on the look of models, you can mostly simulate it in LDView by going into LDView's preferences, enabling primitive substitution on the Primitives tab and then setting "Curve quality" to its minimum setting, and then checking the "Flat shading" check box in the Misc box of the Effects tab. (Note that "Flat shading" and "Smooth curves" are mutually exclusive; they're check boxes because they can both be disabled at once, but only one can be enabled at a time, so checking one unchecks the other.)
If you want to have some idea of what effect this would have on the look of models, you can mostly simulate it in LDView by going into LDView's preferences, enabling primitive substitution on the Primitives tab and then setting "Curve quality" to its minimum setting, and then checking the "Flat shading" check box in the Misc box of the Effects tab. (Note that "Flat shading" and "Smooth curves" are mutually exclusive; they're check boxes because they can both be disabled at once, but only one can be enabled at a time, so checking one unchecks the other.)