There is a Reviews Home » Suggest a Category. However it is apparently inaccessible to any but site admins.
I would have suggested a new Drawing subcategory of Ink and Ink Pens, to cover everything from dip pens, fountains, quills, felt-tips, and ballpoints, as well as blotting papers and other non-ground materials used in 2-D ink art. (I assumes grounds such as papers etc have their own category, and should be reviewed as grounds regardless of what is applied to them).
Did you know a copper nib was found in the ashes of Pompei, which was dated back to the year 75 AD or so?