Please make copying layers in to another file possible.
Now you can only copy entities in another file onto the same layers when the exact same layers are available in that file. And thats only goes for Layout 2016!!! In Layout 2017 it seems impossible all together.
Copying entities into a new, blank file WITH the layer information is impossible.
For example, I had a file that had an error reoccuring. The only way to get rid of it was to copy everything into a new file. But all layer information was lost.