1) The runway creator tool is very handy but it creates very sterile and perfectly flattened runways. I haven't found a way to create sloping runways like those found shipped with the tech demo. Perhaps we could get a slider for the amount of flattening we want the runway tool to perform before it places the runway. Or in other words, how closely we want the sloping of the runway to follow the terrain.
2) I was attempting to create real airports at low elevations near the shore, but they would often be below the water, especially when the runways should be built on man made land jutting out into the water. Will artificial land underneath roads/runways be possible for elevating them above the water?
3) Are grass runways and airfields easy to do? Ideally they would follow the terrain, but all the nasty rocks and bumps would be removed along the path, but not too perfect. Once again, a slider could be used to determine the bumpiness of the field. Maybe the grass could be cut shorter/lighter color to visually ID the airfield from the air.