The problem is that a chopper has 3 extreme points on the throttle (-100%, 0%, +100%), that's why the control is like it is. You really cant take any of the three out or you wouldnt be able to fly properly.
Practise with it in the editor and you get a hang of it and you start to like it as you can do some quite cool stuff with having all three points easily controlled with the throttle on your joystick.
