I don't know if this has been touched on.. but here's advice on how to fly the helicopter, and getting so good that you can fly them just like they did in the trailers!!
Tip #1: Biggest Tip of All... DO NOT FLY IN 3RD PERSON:
This is almost impossible because you can't gauge anything about the actual 'nose' of the copter flying this way, and in return all you get are what seem to be very twitchy controls and a very sensitive helicopter that flies all uncontrollable.
Many people have criticized the handling controls of the copters because they flew like this... and well... unless they switch it up.. they'll continue to be terrible pilots.
Put the camera in 1st person POV and you will notice immediately that you can see EXACTLY where the nose of the copter is tipped and how much EASIER it is to have total control over it. With practice you can fly EXACTLY how you want to fly.. under bridges, and pulling quick maneuvers that your crew will DEFINATELY be needing from a good pilot.
Pass this advice around, it'll be essential for your pilots.
Tip #2: There is no tip #2! - Just Practice!!