Regarding membership, I consider this a feature request. I also could use a way to find users who have not yet validated email or whose account is locked. I will try to get to this in the near future.
I don't have plans at the moment to implement reports for the Shared Files feature. It currently tracks how many times a file is downloaded but it does not track ip address or dates (though this data is perhaps captured in the web server logs), it just increments a count, we don't store a record of individual downloads in shared files. Maybe someday I will make a Shared Files Pro product with more advanced features.