I think we could combine reports-home.pl and guided_reports.pl (used saved) by having reports-home.pl show the saved reports, and having the options on the reports-home.pl page down the left side. Some of it is already there. I'm not sure about other libraries, but 99% of what we do in reports is saved.
I'd agree to use the complete navigation as on the other pages on "Saved reports", but I think as we have a module with multiple pages and reports that go with it, it makes sense to have a start page, like we have for the other modules. You could change the module link to be saved reports with jQuery maybe?