I agree with Overlag mostly...It's a two-edged sword. If you're on a map(or Arena) that promotes furballs, then people running around between the town, or field, and then darting in when you try to engage(and get eaten by ground guns, giving the ack runner a proxy), Well, that gets really old, really fast. On the other hand, you'll get pissed when the AA is so weak that some runway warrior will orbit out of the fight, waiting for you to kill his countrymen that he wasn't gonna bother to save, to get a vulch kill on you while landing.
So, to put it bluntly, It's not the AI that's the problem...It's the human element.