Those shadows look excellent! Good lighting really makes a sim immersive!
In can be "fun" sometimes in FSX to just sit at the gate in your aircraft and watch the AI planes do their thing whilst you setup a long flight (align IRS, flight planning, refuelling, boarding etc). Shadows/lights in cockpit from external sources would be amazing and help convince the player they are in a dynamic world.
The UFO (free cam) controller sounds nice, but also could you have a "person" controller with camera say 6ft above ground level and ability to walk/run. I guess it's just a more constrained version of the UFO controller.