4. We cannot do this because:
- we would have to open document to read this info which would slow down scrolling a lot
- there is no space for this info
7. Yes, we will consider adding that in the future.
6. We are working on this, in new version deleted files will go to 'Recently Deleted'.
Just one remark - even in current version deleted documents, when using iCloud, can be recovered. You have to go to icloud.com, Settings, and at the bottom in Advanced section click 'Restore Files.