JSON output for APEX_DATA_EXPORT is pretty straightforward, but it contains no indentation and the commas are at the beginning of the line, instead of at the end. However, I confess, I don't know what the official style guidelines should be, or if that requires some post-apex-data-parser style sheet application.
The feedback I'm getting from my users is that the JSON looks ugly, and indeed, online beautifiers make it a lot prettier.
The question is: can I influence/beautify the JSON output with APEX_DATA_EXPORT?