There is a countdown progress bar in the lower  status bar area that displays the time left before the next auto save.  The color of the bar  changes as the time counts down.  Auto save will only start when there are unsaved items in  the project.  This is a useful visual indicator when working on a project since ADE will stop taking user input for a short time while the autosave is in progress.

Push back direction is not honored by FS, so early versions of ADE have not provided access to this property.  However some third party products make use of this value so it can now be set for one or multiple parking spots

The method for setting offsets for runway VASI/PAPI is changed.  Distances are now from the runway edge and from the runway threshold.  In the original methods distances were from the center point of the runway.

Project Tree that displays all user editable objects in a project.  Navigating the tree allows the user to find and/or edit objects.  This provides an alternative to individual lists and also provides access to some airport elements that are not available in another list view.