I would reeeally like an option to set permissions for upload and view, but no delete. Permissions are so important for these file sharing systems, and the more granularity the better in my opinion. Thats what sets buzzsaw apart from 360 (that and the significantly better reliability).
I just had a sub delete a bunch of versions of a file and upload a new file instead of just adding a new version. Basically anything someone can do to screw things up always happens, so I need to be able to control this! Other file sharing systems have had the capability for years, so I'm very tempted to switch back to our old, non-cloud, methods.