Wow.
This sounds like a very user friendly system. It sounds like a system tailored to many styles.
For those who don't care as much about the game art/landscape, it sounds like the prefab and clone tools will be super useful, leaving them to focus on the story.
For those who are perfectionists/artists, they can tailor it down to the minute details.
I am really excited by this! This sounds like the best editor I have used to date! Well done Larian Studios!