I won't mention that I raised this issue when 7.3 came out but none the less...
work around suggestions;
Use one of your previously designed blinds as a template for your new one. It would have settings that would probably be pertinent and usually show only those graphics that you would skin anyhow.
open the default blind, go through it eliminating substyles and extraneous graphics and save it as "default" blind. when you start on a new blind open the "default" and save it as something else.