You can extend that issue to all vehicles. If you land in the path of a ground vehicle, it will collide with you, trying to make its way through you.

I support the reported issue.
I fly 3-ton helicopters in real life, and the altitude losses in Arma3 by any attitudes are a joke. What I am missing most is a drift induced by the helicopters moving mass, there are no signs of that in the game.
The use of the collective seems to represent a height over ground here. This is completely wrong. In real life the collective decides about the amount of lift. The pilot then determines if the given lift is used for speed or altitude by his cyclic inputs.
Also the pedals are way to powerful at high speeds in the game.

I wonder at the moment what seat we exactly talk about. When entering as pilot, my character takes his seat on the left side. But in helicopters, pilot's seat is on the right. what is going on?