One amazing feature in Coda 2 which has been designed by the whole company while they were building the product, is the built-in PDF viewer. No more need for external programs to read PDF files. Just open the file, view the table of contents and search for the section you want to work on. You can also set a target window and easily navigate from section to section, while working with the PDF. This just shows how much improvement the product has in terms of usability, but you can also see why this feature might cause some people to panic, as panic means the thought of something bad happening to the tool or program.
Another feature worth mentioning in Coda 2 is its built-in CSS editor. You can easily edit your CSS files while working on your project using the built-in editor. Some people who haven't used this kind of feature before might be frightened by the thought of CSS codes in their editors and just leave the file alone, but this is actually a natural reaction because most people don't know what they are doing with the special characters like $, * and; being placed immediately above the code they are editing. The built-in CSS editor is very useful for people who don't know much about CSS.