Import Audit

Please could we have an import audit log, with a preview pane (like in Cascade) so the import can be viewed before it is run live into the system. The audit output in cascade can be used to balance to the client sheet and also highlights any omissions e.g. leavers on the import or duplicates. It would be good to have an errors and exceptions part to this audit. Can we also have an 'undo' facility should the import go wrong on the system available just after the import.