You should make it so that you can select a tile and set it's brightness, also, you should make it so that you draw, and select the objects from a menu, instead of selecting a preset tile. It will allow for more possibilities.
Well, I'm not really sure how to implement some of those things, but I have made it so when you click on an object, you can select objects to place on it from a menu, like notebooks for example.
If you are talking about Ultimate Edition being ready, well no, I am still working on it. But I will be releasing a demo of this level editor soon with some of the planned features.