I am not so experienced in animating yet, but I have my hierarchy of shapes and need to animate the top-most layer in the same way as the bottom-most… in some cases they even can not share the same parent group.
I would prefer to group the dependent shapes, but then the drawing order is destroyed… I try to mimic a bone tool with the groups. I know from other animation tools like Spine that you are able to adjust grouping and drawing order independently.
A other solution could be some kind of binding between these two shapes, so when you update A then B will be automatically updated. but this sounds like a terrible UX I think.