Another thing.
The start game menu has multiple maps, if it will have only Slate, what will be the result? We will be able to have a in-game customiser for the Slate map or something? And what will happen with the load menu, considering it has the ability to load from other maps.
What else I'm saying is that a integrated map editor for plate that can change lightning and skybox would be interesting and useful, with save-able settings like in the brick menu, and when you press start game you have no map, but instead you can change the map real-time, in-game.
That would be nicer and easier instead of making everyone use mission editor and/or having most of the maps the same if the menu is removed..