I'm surprised you and T-Hawk build a fair amount of fighters. I've never seen the AI build anywhere near a realistic amount. I go 95% bomber 5% fighter, and only deploy the latter after a bomber gets shot down.
Fighters are not for offense, but for defense. You can't shoot down an enemy bomber with a bomber. If going up against an opponent who has had time to build their own bombers... with the new lethal air, you don't want your carrier fleet bombed out, relying only on the "AA" of the ships. Likewise, the AI likes to mass its bombers. Combine lethal bombardment with units in cities being targetted first, an AI bomber SoD not only redlining your border city but emptying it, and then one cav charges across the border, and bingo.
Yeah, I'm paranoid. But if a bomber can now take out infantry or other pricey units in a city, why not build some fighters and actually END the threat?
Of course, the real solution is cavalry, to end the game before it goes that long, but hey, I'm stubborn, you know?