The built-in editor has been given a whole array of tools to help make editing the world / map even easier.
To open the editor:editor
You can teleport directly to items in the left list by double clicking OR you can perform actions on the selected item.
You can add a new room, edit rooms, objects, export, run scripts and more. I will try to do a video demonstrating the editor and how to use it.
The right hand side is for scripts and will accept copy and paste, can be exported, run and more! Don't forget to terminate lines with a ;
~ L