If you create a Blueprint and only modify the default properties, it is considered a ‘data-only’ Blueprint and uses a fast path for execution. These are essentially archetypes from UE3. These used to open in a simplified editor that just showed the properties. Is that really what you are asking for here? Functionality-wise it seems like most everything else is already there.
Saving an instance to a new child Blueprint while keeping the properties intact might be nice as well.