Alright so at the moment, I have never seen a ground AA truck/turret/fort turret shoot down a plane in even ONE instance on nations, AA is absolutely terrible and during sieges, a singular fighter can push multiple tanks alone, a bomber can wipe out an entire movecraft force, and on top of this both of these crafts are invisible 90% of the time and can go in and out of render at a seconds notice. They are also the cheapest combat movecraft by far. On top of this. if you are not completely incompetent you can hide a zeppelin/aircraft carrier hundreds/thousands of blocks away and have infinite access to a cheap extremely powerful movecraft.

The main problem is AA trucks SUCK and get dropped in 5-10 seconds even with the recent periscope addition. They can have almost no armor they can't go over water (so good luck using them outside of anywhere in central Europe/western Russia lol) and, they have to eat up an entire movecraft pilot and need to be constantly babysat (they will die anyway with no contributions).

Light tanks, the normal non-heavy variant of the HeavyTank SUCK. Since the movecraft update I have only seen them used as a discount somewhat more annoying IFV with a mid-tier tank cannon that can only sink zeppelins/trucks/ifvs. They instantly die when a heavy tank breathes in their general direction and are effectively a worse version of both the IFV and HeavyTank combined.

To remedy this, I suggest giving them a use, fixing multiple things with a single, pretty cool, and novel addition;

AA guns on Light tanks, that would REPLACE THEIR NORMAL MAIN CANNON (IMPORTANT NOTE) and would allow these tanks to be able to counter something else rather than sitting there and being used as a discount IFV.

This would also allow them to still have their mg turret (which is the only thing people use them for now anyways) while still countering fighters/bombers meaning you don't need to have a movecraft pilot on "stare at the sky then get insta killed in 5 seconds" duty anymore.