Its not just in MP, in single player if you get AI to enter the chopper it destroys the rotors some how. I never even knew there was an option in arma that men could destroy chopper rotors, but I do now.

I think you'll find that this combination of weapons is good and balanced.

I was not going 100knots, 100 knots is 185kmph, it has wheels and should land just fine.

This is not needed, You can mod what ever you want in relation to tracers. There is no need for this to be a BIS problem. You will find in real life most magazines are full of tracers for the first "contact" as to show the rest of your section where the enemy is.

You seem to kill yourself very easy in most vehicles, even driving over a rock at speed kills the driver, yet the vehicle is still fine at %100 health. Same with the chopper crash into water, at low speeds you should be able to have a 3-5 second gap to be able to get out the sinking chopper yet it kills you while the chopper is still intact.