I'd like to raise an issue which bothered me since the original SupCom, but was made very apparent in FA and it's reliance on hordes of ASF. I don't know wether it is possible to do, but I'll mention it anyway.
Essentially, once a side gains air control with ASF, it is hard/impossible to the other side to regain it. This is because there is no ground based solution to counter ASF effectively. The reason seems to be fairly simple - Bunched SAMs tend to target a single plane out of a swarm of ASF, which leads to a massive overkill and most missles being essentially shot into nowhere.
This is also visible, but to a lesser extent, in ground based PD ( and just about everything, really ) - this is because ground based units are harder to bunch up and are slower, thus they remain longer in the killzone of the PD.
My suggestion - Introduce a firing mode, turned on by default on PD of any kind, to shoot at _random_ available targets of tech level equal or lower then the PD.