New features aren't getting developed because Metabouncii is almost finished by now. We added a lot of new features last year, and we don't have any feature ideas anymore. This doesn't mean Metabouncii is not going to get updated anymore. Post editing isn't planned, at least for now. It is a hard feature to implement and would need a new page just to edit a post which is something we do think is unnecessary to add. If you write something wrong just delete it and post it again.