Ebay giving "suggestions" for item specifics is NOT a new feature. There is a section on your Selling Manager page just for that and it has been there....for well over a year now maybe 2 years or longer. I don't really keep track but it is NOT a new feature at all. And yes eBay will post suggestions when there are missing or suggested items specifics.
This is so you can use it to get better placement in eBay searches, google searches, etc.
All of that has nothing to do with the fact the the Item Specifics are totally not transferring over to eBay at all when they are/were already in the Auctiva listing page, saved listings, closed listings etc and just not transferring over to eBay.