We always run into errors when including "additional_attributes" column because one of our custom attributes uses commas/description-type box. Changing the delimiter is not a good solution as it also means updating it on your machine. Our CSV's are usually transferred to multiple people and should always be ready to go with comma delimiters. We would like Magento 2 to use Magento 1's system of separating each attribute into it's own column. The importer isn't very useful for bulk product uploading if our most important attributes need to be omitted and we've resorted to a Firebear Importer module. Could this be something a future version of M2 fixes? This would avoid a lot of headache and make a much more readable CSV product export.