Have used a similar approach to Geert for a number of years, generate rtf or word, save locally, if rtf convert to word, modify local copy, and, nowadays upload to SharePoint. I gave up generating PDFs long time ago.
Typical changes that in my experience need to be done after converting to word:
1) grammar and spelling, Sparx EA grammar and spelling features are far behind what Word can do.
2) format adjustments, such as maximising page usage and, at the same time, reducing document size, or fixing tables; Sparx never seems to get table formatting right to a publishable standard, specifically header row shading.
3) acknowledging contributors and adding document history.
4) writing executive summaries.
Improvements I would love, conditional formatting, specifically easily and dynamically change the page size and orientation based on a diagram’s page settings.