Hi Autodesk!
My suggestion now is to allow IMATE on factory layout.
When we do not ride with connectors we need using the assembly constrains on Inventor, however the restrictions are same three ever and could be as follows:
One of the landing surface, that exists;
One of the X position and one of the Y position
The last two can be created with IMATE and this facility help a lot the users when using the asset.