As I understand it, the vehicles are going to work as some sort of checks and balances, almost like a paper, rock , scissors game. For example the halftrack with the AA gun on it is going to prevent vulching at airstrips by attacking the diving planes, and the tank is going to be the "foe" of the halftrack aa (M16).
What about adding some sort of scout car? The scout car will be faster then the tank, also able to take out the M16 but cant be used for AA, this will force Tanks also to protect the M16's. The Brits had one called the Daimler, which they used for patrol in N Afica to harras the Italians, what do you guys think? Might be worthwhile.