We like to see the concept of the mask shape to be changed.
Now, after adding in image to a mask (or plain shape), you can only move the image within. But you cannot move the shape itself anymore.
We like to see the option to 'lock 'the shape in the admin options (like in the previous Flex editor). So let us decide if the user can move the shape or not. Most of our user want to be able to move the shape.