The current WordPress file structure is poorly constructed. You have some 23 files and 3 folders in the root folder. But the only relevant files to a designer/developer are in the themes folder. You have to drill down 3 levels to get there.
Ideally, WordPress would be organized like this:
/wp-system (or something like that)
That way, the theme folders are immediately accessible, and the hierarchy of the file structure represents the usefulness and relevance of the files to the user.
Just my two cents. Thanks for reading!