The Structure label can't be rotated individually in the same way as it can be done with for example CoGopoints. When W&S Engineers want to create Sheets for long project they need to export labels before publish to pdf and it takes long time to rotate the exported labels manually and if design changes and the labels need to be exported and rotated again.
If the label could have been rotated with a property, the rotation of the structure label could be done automatically using Dynamo or by hand and then be stored in design file with in original format and civil 3d objects.