And why is that a problem?
Will there be a level builder in game like this:Create a server, when selecting a map at the top it will show a square box and a have a + in it but bigger.Do you ever think you will be able to add this?
Ever see a kinda.. well crappy game maker program called Mission maker? He means something like that.Rooms will be pre-made and the user can choose where to put those rooms.
Watch a few of the videos in this series:http://www.youtube.com/watch?v=-ARzSkFLCE4You will understand why I frown upon ingame map editors exactly like the one above.
some people like quick and easy map design.