1. When you have lots of planes on the deck, you salute and no one comes and you don't know why
2. Directors waste cats, they tend to send all to the front 2 delaying everything
3. Worst thing, besides correct points made by OP, is the fact you CAN'T position planes like airports so your departure flow is ruined. This is even worse because point 1.
Last Friday we had a mission that went so bad that I had to some tests in which you can see directors send people mostly to the front.