I think this needs escalation to product, with a clear answer on 1.
Assigning to nod_ to provide some guidance.
It is worthwhile to look at Kevin his evaluation at https://docs.google.com/spreadsheets/d/1vifOGL_4wgOl6sy2Os59k24saIHvwFFQ...
Wait, but do we need to expose a UI for everything? Or is this just a 'in case you want it' kinda thing.
Alright, so this greatly impacts i18n - who made a major follow up.
Oeeh, nice. Looking forward to the A11y review
This is a critical UX bug.
#627080: [meta-issue] Additional categories admin/config → Will be the issue, where we create additional categories.
Can we please keep this at highly-highly critical, we will need this to have a good IA. Because the UX-Team already pointed out, right after we ended the streak of creating all the initial categories that we need Drupal to provide more good defaults. Not to only to keep consistency but primarily to provide direction, sorry - but IA is critical.