Hi everyone. I've been researching ITF forms for over 2.5 years now and have just completed an analysis of Joong-Gun that I'd like to share. I believe that the form is logically organized around the theme of kick catching. The form gives you four takedowns you can perform after catching a kick, as well as four escapes in case your kick is caught. Half the form is a counter to the other half of the form.
The organization is like so: