http://blogs.battlefield.com/2014/01/bf4-balancing-vehicles/
DX told me about this patch earlier today.
I'm glad the Mobile AA is going to be nerfed. It could shoot anything in the air from any distance with no bullet drop. It was insane how quickly it could destroy anything. But it only has 6 total missiles that is being reduced to 4? I never noticed it would run out of missiles.. I wonder if that is per the life of the vehicle or per person who enters it. Could we just jump out of the vehicle and re-enter it to get all the missiles restocked?
I enjoy getting in a helicopter, but if the other team has a mobile aa, then i wouldn't even bother trying to get in the air. I thought some of these upgrades already went into effect because I was in a scout helicopter yesterday and the 25MM cannon hardly did any splash damage to infantry. Then again I was lagging, maybe it was a server issue at the time.