Due to the way the game is programmed, I doubt we will ever be able to alter the ground surface. The gridwork and texture on top of it is pretty much set in stone and essential part of the maps.
Its cute idea, completely inapplicable tho.
I would however, enjoy getting more build mode items with water features. We only have two kinds of water wells and about two fountains that allow drinking from among the DLC. We could have more of those, preferably of different themes.