I couldn't agree more.  Simple delivery is simply inadequate.  It does not allow for customer variants, it does not facilitate combined postage, it does not allow signature on arrival, it does not allow for 2kg-5kg parcels; it does not permit medium parcels of over 61cm & it does not offer compensation for delivery to the wrong address.  It was (ill) conceived & just an additional way for eBay to make money from the carriers concerned, with whom it has contracts.