Unfortunately there is no way to change the value that the Auto Angle Setter AU sets. You have to either configure your symbology so that the rotation makes sense, or you could write your own autoupdater to have the behavior that you desire.
We actually have the code for the Auto Angle Setter AU available as sample code! You can view this sample here:
The code for this should be pretty simple to get how you would like it. However, this would require that you register the custom AU on all of your client machines.