No Thom doesn't stop. He truly doesn't. I know for a fact he is continually working non-stop on features, functions and improvements. He takes suggestions and input into consideration when re-doing anything. OR adding anything.
What I do when I have tweeked a Listing template is I will Queue and list only 1 auction. Then I'll see how it displays. If it isn't right, I can edit it on ebay and then change the template in AW2K.