From my experience 1-8ing in the server along with many reaper pilots either in-game or in their own testing environments have discerned that DCO vehicles contains a bug to receive 0 vehicle damage when manned by AI. This creates a problem as a CAS mission set is to shape battlefields by removing HVT's. This is rendered impossible with any munition as it is less likely than a coin flip that you will have success striking any manned vehicle. In an expected meta-gaming manner, the current CAS mission set has been flipped on its head by being forced to choose loadouts with less devastating munitions as CAS will only be effective on infantry/bunkers. In my experience IRL, fire missions on INF in the open is so low on the totem pole, to ignore HVT's and instead focus infantry is mind bending. This is unavoidable however with the current environment caused by DCO vehicles. My hope is that some solution can be found soon. CAS in it's current state is completely unrealistic and does little more than ground units can manage on their own.
Comment from DCO team, “So I've come to a conclusion, Damage for aerial vehicles some reason does not affect armor when AI are present inside.”