So, I feel like I should step in here to provide some history and context.
I initially developed the theme used by ClassicPress.net a bit more than 6 years ago, using Susty as a starting place. As implemented for ClassicPress, it was/is a full-site theme, not just a blog theme. It contained lots of styles and template features that were developed specifically to meet the needs of the CP website (many specified by the designer), and may be of little use (or confusing, such as the custom thumbnail instructions meant to serve as a reminder for blog post thumbs) to someone using it to create their own website. After a couple of years, I stepped away from maintaining the CP website and it was taken over by other community members.
A few months ago, I decided to create a web journal, and to use the ClassicPress theme from the directory, thinking it must have been modified to work as a more general theme if it’s in the directory, allowing me to get my journal up quickly with minimum fuss. What I found was that, while there were a lot of modifications to style sheet, files, and templates, there are a lot of things left in place that don’t serve a purpose in a general theme. It took me a couple of days to further modify templates and style sheet to get the simple journal website I was hoping for, modifying or eliminating things that caused problems (but not stripping it to the chassis and rebuilding, as probably should be done).
Bottom line, I would not recommend the ClassicPress Theme be on the directory nor included as the default theme until it’s completely overhauled. Being called the “ClassicPress Theme” implies a quick and easy implementation for a simple blog-type website, and that’s just not the case; unless there has been some work on it since I downloaded it a couple months ago.