Copy and Paste for scenes
When creating a new scene, it would be good to be able to copy or clone an existing one as a starting point/template to avoid redefining all devices, conditions and triggers from scratch each time. Particularly if the new scene to be created is similar to an existing one.
Luke J commented
Agree with this - often when making a scene you make two or more that do similar things (i.e. turn these 10 lights on, turn these 10 lights off). It's painful to go through and pick them individually.