The ability to change the change the name of main attributes in the editor and adding custom attributes.
The same for skill school and talents.
So i can add holy and shadow schools for example and player can add points to my custom schools or talents.
(I know you can change localization txt to change whats displayed, but this doesnt add new attributes/schools/talents.)

*A drag and drop interface for allspark so i can modify placement of effects and keystone animations without manually editing rotations and placement locations through xyz numbers.

*An animation preview window in stats editor.