One thing i found is that the EDITOR IS NOT FULL YET!!!
When you click "D" for doodad layer and just bellow "Selection" on the left you click on what terrain type of doodads you wanna see "Interior Instalation,Interior Cave,Ice,Generic and Desert are EMPTY!!! everyone of the terrain sets bellow them has like 3 or more different types..
Old units are no where to be found
Icons aren't filled up yet!!
so i guess blizzard will further update the editor and may be add even 15 more terrains witch will be FUCKING AWESOME o.O a 45 terrains o.O