Order Approval Delegations and how to Revert it back

We use purchase order/requisition approval extensively here and many of the Approvers are included in a large number of approval routes. When an approver goes on vacation, the admin has to go into P43280 and export all the approval routes they are on, then delegate those approval route records to the person who is covering for them. Then when the approver comes back from vacation, they have to query the delegate's list and delegate back only those that were exported from the original approver; quite a labor extensive process. We are wondering what other E1 customers are doing for delegations