Feature summary (what you would like to be able to do and where):
Instead of (or additionally to) having an input for the page title, we would have an input for the actual content.

Might be rendered as a textarea, but that might require something like multiline=yes

Considerations

• Should there be only one input for the content while the title is provided via default= or would there be two?
• I can see, why one would be against such a feature when imagining having to
  • load a full-fledged editor for this
  • parse and URL-encode entire wikitext
• (cont'd) so, supporting only a subset might be a suitable compromise

Use case(s) (list the steps that you performed to discover that problem, and describe the actual underlying problem which you want to solve. Do not describe only a solution):

• Providing a comment
• Adding minimal raw metadata to a non-default slot (T382673)

Benefits (why should this be implemented?):
When combined with T194606, workflows could be improved