Nothing it's wrong with infil/exfil by chopper. :) I enjoy when a play coop and one of my mates pilots an helicopter in a night fast and bumpy ride to an objective. Only suggesting that flying a helicopter for a campaign mission should be an option, not an obligation. Those who like to pilot, can pilot; those who like to drive a tank, can drive a tank, ...and those who prefer to play the role of an infantry man will be more than happy to take a ride in a SpecOp mission, but without the need to pilot the helicopter.
And yes, of course, you can edit and tweak and script so much as you want, can or will, ...but for me it would be nice and easy to be a pilot only as an option. I don't want to take anything out of the game, I only ask for more flexibility for the player in choosing his role in the game when you are playing the campaing missions.