Yes, it's totally frustrating!  I now have over 3000 to list the item specifics (all the info required is already there!!!)  Ebay advice is that all current listings will be OK, but once you want to relist they must have all the new format item specifics. And, of course,  all new listings have to have the new format - that's the easy part.

I'm just amending as many a day as fits in with my schedule - figure it's going to take me a good 4 months.

Good luck to us all!!!