Surfaces/edges/vertices etc. needs to defined in ‘Reference Tag’ at Configure Module assembly level to be used at Configurable Product level.
This should behave like a normal assembly. It seems like a lot of time to set up "Reference Tag" on all the items you want to be able to reference when placing components, creating sketches, sketcher references, etc. Specially when you have a master assembly, you have to go in and "Reference Tag" every item to use. Just seems like a lot of time to be spent creating all the Reference Tags when it could behave like a normal assembly and not have to set those all up.