We will put out some tutorials and hopefully release the editor to beta testers later on, but right now we aren't releasing any new information as the editor is currently be worked on.
With that said, I've tried out several prominent RTS editors, and DOF's is by far my favorite. By easily tweaking attributes such as scale, transparency, hover, pitch, etc. you can create just about anything - from usable custom staircases to breach-able custom walls. I think once the editor is released, testers will be very surprised to see what went into some of the detail work that looks like a solid object. I won't get into detail, but it's an incredibly efficient editor as well, allowing designers to save and load templates to reuse, copy and paste large segments of environment, toggle effects without any scripting to create something entirely new, and pretty much whatever else you can think of!
Here are two older showcases on the editor: