Well that saves me some work, thanks for the quick update 
I did finally get to play a bit with this installed and the overall effect is very good. Its amazing how such a relatively small change can add so much without really changing the game, now I look forward to building a decent airforce for a change.
Unless you beat me to it Dale, I plan on adding support for the AI to make a descision rather than using a random chance. Nothing terribly fancy, just basing it on their current warplan and the proximity of friendly units to the target city.

I did finally get to play a bit with this installed and the overall effect is very good. Its amazing how such a relatively small change can add so much without really changing the game, now I look forward to building a decent airforce for a change.
Unless you beat me to it Dale, I plan on adding support for the AI to make a descision rather than using a random chance. Nothing terribly fancy, just basing it on their current warplan and the proximity of friendly units to the target city.