Prestashop has the awkward limitation that only one product can be submitted at a time. This makes it impossible to sell related products on the same page. See also my proposal for combinations.
One of the requests is multi-edit. That would require submitting more than one product at once too.
What seems the logical solution to me is the solution that I have applied in Prestools: adding a number to each product. As in Prestools such a routine could easily be made so that it an handle both fieldnames with and without a number so that backward compatibility could be maintained. The only fieldname that would need to be changed is “ean13” but there are few – if any – modules that change that field.