Etsy's shipping profiles have to be edited individually. Even deleting them has to be one at a time... it's excruciating. Especially when integrating a POD like Gelato to Etsy, because Gelato adds in ALL their shipping profiles for ALL their products. Removing them was horrible.
This action can be done in Etsy. From the Listings page... 1. Select the listings you wish to change. 2. Click Editing options drop down. 3. Select Change shipping profiles.
I think your answer just addressed the categorization of multiple listings into common shipping profiles. What we need is something that will actually bulk remove a whole list of shipping profiles that are unused.