I can understand if people start to think that ur almost done. From my experience fine tuning takes most of the time. So take your time

Also are you re-doing the whole airport from scratch. I thought from previous pictures you already had created the main airport structures??
Finally are you going to include taxi lights ???
Also for night textures, i noticed in real time pictures the whole airport seem very yellowish. Instead of using light effects to lighten up the airport (which also eats up FPS), i suggest re-painting ground textures slightly from Photoshop (Ground textures that are near the airport buildings or around the lamps), just like flytampa.
What i am doing for my airport is that I add a layer on top of my picture. On the layer, add black colour to whole picture then using white-yellowish shade spray some of that colour over your black picture. Try doing it few more times with slight change in shade of colour. It looks so cool by doing that.....