Project deletion protection includes user's personal namespace
Problem to solve
When the project deletion protection is enabled users aren't allowed to delete projects in their own personal namespace. This can be confusing and add administrative overhead. Ideally, there would be an option to allow users to manage their own namespace, but also block accidental deletion by non-admin users in group projects.
Only admins can delete project
Further details
The docs don't indicate if this is intended (blocking the user's personal namespace) or not. So it appears this is the expected behavior. It may also be good to potentially add some clarification if this is intended.
Proposal
If the current behavior is intended, add an option to allow users (or not allow) to delete their own projects. Add an additional checkbox for restricting user's personal namespace.

