1 - That is why you group your events
And then you can just copy/paste whole groups
2 - I am not 100% sure but you can type into include events from
A scene
So you would leave your scene as it is and just load from it
I never tested it but it should work
Actually if this works i think it would be worth asking for it to be a feature
Same for external layouts
You can type in name of scene yet idk if it would work
BUT then why it should not?
I am going make feature request