Stealth?
Currently in DCS, it seems to me that as soon as you are within range of a say a tank in the Ka-50, you immediately get painted by the laser, and soon after you are being fired at with missiles, cannons or guns - and not usually just one tank, but all of them nearby!
Given that neither the Gazelle or Bo-PAH has no armour, will it be possible to remain hidden behind trees, buildings, hills so that enemies are not aware you are there (surely you cannot hear a helicopter from 3km away when you are in a tank?).
I would absolutely love to sneak up on a unit of tanks or trucks and get the first shot in, then hide under the trees again and attack from another side whilst they are looking at my original position (assuming they have figured out where I fired from, perhaps they don't even know).
You could even have an AI or human wingman fire from an opposite position to create confusion for the tanks, so that perhaps only one out of them all will see you at first.