I keep on playing this game over and over despite having played each of the maps a couple times. This is the sort of great game I enjoy. Thanks whiteboardwar!
If you're wanting to get that hard badge, fit the low quality hull, max out on just about everything else and then don't go through any of the booster gates. And seek out as many refuels as you can on your way up.
It's definitely easier to see what terminals have passengers to pick up and where they're heading in this one, but ep1 was better for overall airport control. More emphasis should be on putting the right people on airplanes rather than pulling airplanes up to the terminal quickly.