Hi,
It's because News2 and News too are mostly based on widgets, our other themes are easier to configure, but in the other hand you can more freely create your own layout.
Thank you for your suggestions, we are also working on better theme documentation.
You can also install the quickstart package to create website exactly as on our demo sever, then change the content or check exactly the settings/configuration, there's also option to import/export theme settings and demo content. (unortunately without widgets)