As a Portal Admin, I believe it would be useful to have an export feature available directly from Product Menu -> Control Panel -> Configuration -> Audit. Portal admins can pull this information from CLI and through database query, but it will be a nice "value-add" to have an export button directly on the audit page.
As a Portal Admin, I would want the button for export to provide me with different types of files to export to. (CSV. tab delimited, PDF, etc) .
As a Portal Admin, I would want the export button to feature the ability to select date ranges.
As a Portal Admin, I would want the export button to work syntactically with the built-in Audit search features (which are good).