Hi Community,
This is something we are currently working on, but it is a very large project because eBay is completely changing the way item specifics information is submitted to them through their API, which is the system we use to communicate with eBay. It's too early to tell definitively when we'll be able to get these changes completed, but I anticipate we'll have our system updated to support all of the item specifics options in the next couple months.
-Mike