Problem: To make a deletion request for a Commons category, not being a Speedy deletion, requires a lot of effort and steps, see c:Commons:Deletion requests/Listing a request manually. Not only you need to nominate the category for deletion, but you also have to (1) Manually create a subpage of deletion request, (2) Manually add the newly created subpage to Commons:Deletion requests/JJJJ/MM/DD and (3) Manually notify the uploader on his/her talk page. While these extra steps are automatically implemented when you nominate a file for deletion.
Proposed solution: Make an automated process of the extra steps, like for nominating a file for deletion.
Who would benefit: Editors who nominate categories for deletion, not being a Speedy deletion.