Just like any other community website, Drupal.org has lots of places which could be changed and improved. However upgrading such a website to the next major version of Drupal is already a huge undertaking. So when we originally started the Drupal.org D7 upgrade project our goal was a straight port to Drupal 7. No major regressions, no major new features.
Nearly all sections and pages on D7 Drupal.org will look the same as they do now on Drupal 6. This includes documentation pages, project pages, case studies and marketplace nodes, issue queues, change records etc.