There is a new menu item at the bottom of the left column that replicates some of the old sites menu navigation to aid those familiar with it. It has both the top and left home page menus (only a sample for starters). These will generally point into the old pages, but as there is a new replacement they will be fixed to go to the new pages, e.g. Viewpoint goes to the new Viewpoint forum because the old one is dead.
So the action needed is to make more menu items and either point them at an old page or generate some new pages to cover what we want to bring forward from the old site and point the menu to the new pages.