It would be very useful is we can press a button and align the tags automatically without any overlap. We have some shop drawing with hundreds of tags to be placed and to be moved in the correct place. This will help also spooling drawings in 3D and many other type of drawing.
Just align outside the cropbox will be good and also create the arrows with rules regarding the angle: 0, 45 and 90 degrees.
There's already a free plugin available but, of course needs to be developed
http://bim42.com/2014/09/align-tags-revit-plug-in/
Bye
Cesare