I'm currently working on a mod to port over a HUGE amount of items and placeables into GM mode that were left out. I'm also removing the camera limits on the default maps and making them much more customizable (being able to move / remove rocks, trees, wagons, fixing the blocked doors so you can place them, etc etc) and adding some basic structures you will be able to put down like towers, pillars and hopefully eventually walls so you can have a poor man's editor right in GM mode which *should* greatly improve your ability to throw things together "on the fly"
It will never have the power and customization of the Divinity Editor, but it will make it much easier to play the game off the cuff much like you would when running a real pen and paper session where you break out the minis and dry erase markers for an encounter
"OK this upside down cup is the sorcerers tower. Dan and the Dwarf are getting off the boat which is that banana laying there..."
You can check out the mods development here (it's nearly ready for a v1.0 release):
http://steamcommunity.com/sharedfiles/filedetails/?id=1140523854
