In retrospect, it was probably too much for us to expect modding tools that could allow one person to make a module on their own, when LARIAN doesn't have one person who could make a module on their own. Making a map in D:OS/2 is a team effort from Larian.
What you're asking for is not an easy thing in the slightest.
Just imagine how quickly they could build the game if they made modding tools this powerful!
If it's hard for Larian to use the modding tools, then there's not much hope for the rest of us.
They really should be aiming for something in the ballpark of RPGMaker in usability. They should be putting their effort into building tools, and designing and creating content. They shouldn't be wasting manpower micromanaging the placement of every single tree and blade of grass.