Yes, KeFeng, I did. Basically, when axis can't get out of their base anymore, they have lost the game.
And I wrote "how often with air attacks subtracted" for a reason.
First: you name one example, and I know Cobra, but it is one of 30+ maps in FH2. It is a very bad idea to change something in the entire mod, based on the experience of one map.
Second: it is an air attack problem. Place more AA's, preferably mobile ones. Problem solved.