Good morning Mike,
Sometimes I alter the auction once its been uploaded to eBay. So importing the saved listing would work for me. I can then delete the wording that didn't work and replace it with the wording that did.
Under this ID I have approximately 400 of the same auctions. I tweak them quite a bit when I see searches change, key words that are used more now than say six months ago etc.
Hope that helps you to see my reason.
Take care, Donna