One of the things that you will notice when you start using the new menu system is that the sub-menus no longer disappear if you move your mouse diagonally over the menu. Another benefit is that there is now going to be a single button for Achievement. Clicking through to Achievement will take you into what was the Achievement New assessment data entry and analysis area of Edge as well giving you access to the Markbook feature.
Here's a short video created by Jason giving an overview of the changes.