I can't comment on the other points, but I can reply to this: >The other big problem is that they now want each return put in its own box — even if it was ship

I can't comment on the other points, but I can reply to this: >The other big problem is that they now want each return put in its own box — even if it was shipped to us with multiple other items that are also being returned. We have been Prime customers for years, but perhaps not for much longer The reason for this is because each seller can set their own return address. I receive all returns to ensure that they are destroyed and that no customer accidentally buys something new and receives a customer return. Beyond minimizing costs for Amazon/sellers, this also reduces waste and environmental impact because each good only has to be shipped once.