For the sake of transparency it would be an improvement to be able to see the resolution when a report has been done. If I report a post I want to know if and what measures have been taken. This information (the report and the resolution) doesn't need to be public but available for reporter so there are no issues regarding privacy and in the same time brings up transparency.
Knowing that this task is not trivial that could be done over night, we should be able at least to ask moderators regarding reports resolutions and we'll get the same transparency with less effort. Sounds good?