ControlRIg: How can I replace/refresh my updated SKM?

UE 4.27
I have 2 major questions about controlRIg and using it in our previs production.

  1. In maya, if I add blendshapes/morph targets to my SKM and then re-import it into UE4, the controlRig asset doesnt seem to consider this updated SKM at all. The new morph targets are non-existent unless I create a new controLRig asset and copy everything over.

  2. Copying everything over shouldn’t be a big issue, I just need the skeleton/controls and the all the nodes in the graph editor, but everytime I copy over my hierarchy of controls from one controlRig asset to another, the hierarchy completely breaks and everything pastes out of order. This also totally ruins the controller placements since they’re no longer parented.

Does anyone have an advice for refreshing/updating the SKM in control rig, or know why the hierarchy breaks when I copy/paste?