Every update they made the rooftop rumble mission harder in some sort of way they add this small detail that affects it hugely and I bet next update they will make it harder
I predict the professionals will be able to kill you in 1 shot (as opposed to 2-3), there will be 3 buzzard attack choppers to guard the parking garage, and the document will spawn inside of a tank which you will have to kill the driver, but the tank will blow up if hit with more than 2 shots.
No. The document guy would spawn and fly in a Lazer and you have to kill him. One pistol shot will blow it up..