I am curious if there is a good way to take old reports created in the legacy report writer and port them so that they are edited and managed via the new report writer?
The only way I know of is to use the Show SQL button in Report Writer and then copy the SQL into a Custom Table resource using the Advanced Database Query option in the web report. This will convert the report.
Almost all default report from Old Report Writer can be ported to New web reporting via GUI.