The problem here is there is not an issue as in I can only respond based on the actual coding of how things are suppose to work not how someone might want things to work.
If you choose not to moderate the feedback then how is there an issue you are saying post this feedback and make it show right away.
If you do not moderate feedback there is no way to delete it. Once it is part of the system it is part of the system that is why there is a specific moderate switch for feedback right.
If we allowed users to edit there feedback that would be a bug. That is why the only place to edit feedback is the moderate feedback link if you elect to moderate content.
You can run this query if you want to deactivate feedback from showing and make it show in the admin panel where you can go through and delete and approve what you want.
UPDATE pp_feedback SET approved=0;