Copy layer tree to existing layer

Hi All
This might already be possible, if not, consider it a wish. Currently doing a design with a huge amount of variations, all with the same layer structure. I know I can duplicate the existing layer (tree), but each copy gets a “copy” suffix. I have to first move the layers to another layer and then remove the “copy” at the end of each name, which takes a while, when there’s 15-20 layers. Is there an easier way to get around this? Or can we get a “Copy layer structure to…”?
EDIT: Or maybe enable drag + Alt Gr copy for layers like we have on objects?
TIA, Jakob