I know about the existing sub-layout buttons, but they do not work for me since I want 3D assets only, no AutoCad etc.
I propose to allow users to expose and use connectors between layouts and sub-layouts. Even if they are not created from the top level Factory Layout. The user experience should be as if a sub-layout was an asset itself.
This would enable me to have templates for sub-layouts, split up big layouts and I could potentially work with multiple people on a Factory project. This would be a big time saver from performance and project planning perspectives.
This functionality could work great with the new function to insert multiple assets at once.