A very brief intro and some context.
A thorough description of the current state of this "key issue".
What are the most important issues for end users, maintainers, packagers, etc. as a result of this "key issue"?
If there is relevant history (e.g., recent design changes, or potential solutions people tried in the past), explain that here.
Links to key issues, forum discussions, PEPs, blog posts, etc.