I saw the update of Droppics.
According to me, there is still a real miss (or I mess something).
I (as admin) upload a file and assign it to a specific user. This user should be notified but it is me who is notified...
If i didn't miss anything, you should really implement that because that makes no sense to notify the admin that someone else can see and download the doc. It is the user set by the admin who must receive this notification email...
Thanks for your lights