We have recently had to transition all our GTC (Good til Cancelled) eBay listings to the product listing system to allow us to bulk edit all the listings in one run.
We have been successful so far and our listings can now be scaled to mobile and lack the "devilish" active content eBay is bent on removing.
At the same time we decided to update our store categories to match our inventory categories as well as update the eBay category each was assigned too.
We are now trying to push this out to the listings, but so far are not having much luck.
We have updated the configurator to assign categories for both store and eBay from extended properties.
I must say that changing categories on existing listings is not available trough the Revision option. In order to change the Category/Store Category - you would need to open the needed listing template and change it directly on it. You can however open multiple listing templates on one screen:
1) Either if you click on the number of templates shown on the template itself on your eBay Configurators screen -> that will open all of the templates on that configurator.
2) Select the needed stock items in your inventory -> with these items selected right click under the needed eBay channel(which holds these listings) and select "Edit Selected" option to open the templates for the selected items.
With multiple needed templates represented in one screen -> you can select them all -> then open the Category window -> make the needed changes and click Save To Multiple option to save that change for all selected templates(image attached).
We replied to your ticket about this issue.