I don’t really understand what you are proposing. Can you show me a UI mockup of how this would work, what the user would see, what the staff member would see?
That’s why editing is limited by default in Slow Mode. You can turn off the editing limits if you trust your community not to do this.
And consider what @sam said. Make the topic unlisted. Please make full use of the existing tools in your toolkit before proposing more.