Today, there is no way to change which Word Styles Publisher will use when publishing the document.
It would be really nice if we could specify which Word Style to be used when publishing a section, title or property.
For example, in my company, there is a tradition to have dedicated Word Styles for requirements identification and another Word Style for requirements statement. Like this, we can give some highlight on requirements in the document (different colors, formatting, etc).
Today, I cannot generate Word documents from Publisher that are in line with this tradition (and well spread all over the world), so I have a big manual effort to be done after document generation.