At the release of the game the only infantry class capable of taking out aircraft was the scout class.
As of ITNOTT that role was implied on support.
Now they decide to give assault a flak cannon which should have been added with the assault class way before even the firsr dlc
What a fantastic way to say hey scout and support we know we wanted you to shoot planes but now we dont.
Either that or DICE trolled the support class by making us destroy 2 planes then giving assault a flak cannon