So I was talking to our internal CAD support people about how to switch a Revit BIM360 file til "Specify Worksets" by default when opened. Apparently this is currently not possible once the file has been shared to the cloud. This is unfortunate as the alternative takes quite a few extra clicks.
If you think this should be easier there is a Revit Idea topic you can vote on with an Autodesk Account:
https://forums.autodesk.com/t5/revit...idi-p/10037678