The roadmap report is useful but it is difficult to get a broad overview. It would help if it were possible to hide all the detail of which issues have changed.

Perhaps it would be better to draw a distinction between the summary roadmap (like Trac's http://trac.edgewall.org/roadmap) and the detailed roadmap we have now. It might be possible to achieve this using [+] open/close buttons to show/hide the details at the user's discretion.