[narwan]

How many categories would that take? I suspect a lot more than you think or you'd end up with units not firing at potential threats to themselves. A jeep with an mg is not a threat to a tank, one with a RR is. So you'd have to distinguish between those. A BMP2 on the move (no atgm shot) isn't a threat to a M60 but a moving BMP1 is (73mm gun). But if you set it to fire at APC's, you'll also fire at BTR-152's. So you'll have to distinguish between types of APC's. Etc.

How would you categorize a centauro? The upgraded version has ERA which would protect it from most missiles fired at it so you'd want to fire at it with tanks, but the basic version lacks ERA so would be more a target for light antitank weapons and HEAT weapons. So you might have to distinguish between types of the same vehicle.

Of course you can keep it very simple and use broad categories, accepting that it will lead to some 'problems'. The question then is whether the new situation is less prone to exploitation by players and IF so (which I very much doubt personally) is the improvement worth the amount of work involved (which will still be huge)?