Users often need to customize only the Content of the TreeViewDragVisual.

The built-in logic for displaying Drop Target Template  (Drop Inside X, Drop after Y) is well accepted. However, there is no easy way to customize the Content of the DragVisual only , preserving the built in logic. If you create entirely new DragVisual much more code is needed to set up all scenarios.

Will be available in Q2 2015 Release.