There are many of us here who use the ECM/IDC combination and have augmented the Epicor delivered workflows with our own ‘flavor’ to make it work for us.
We have a receipt/packer workflow to link to the image to the receipt transaction and it utilizes the ‘related documents’ feature to display receipts when processing AP Invoices. Could easily do the same with PO’s using APR to store/link a copy of the printed PO, but never found it necessary since the workflow validates Vendor/PO automatically and attempts to match dollar values with the receipt transactions. Our invoices come to a mailbox and everything after that is fairly automatic all the way to the AP Group.
We have many workflows and use ECM/IDC for many things, but our user/license count is very low because only a few folks access ECM directly - everyone else goes through Kinetic and that is single license seat.
We have a customer who implemented the AP Automation from a company called Centreviews, and they seem very happy with it. They have multiple companies in Epicor Kinetic, and each connects to Centreviews: Accounts Payable Automation - Centreviews