It would be beneficial to be able to use the arcpy.mapping module to change the layout template in the layout view by pointing to the path of the template.
For example, currently on the layout toolbar there is a button called Change Layout. When you click it a window will pop up allowing you to change your layout template to something else (ex. Architectural Page Sizes > ARCH A Portrait.mxd).
It would be nice if users were able to incorporate the selection of this template in python scripting for map making purposes.