Enough is enough. 
Get rid of the trees and buildings at the end of the runways! 
The setup of airfields add an unnecessary level of difficulty that, imho, is not needed. Let's encourage people to fly and fight by removing the obstacles at airfields. Widen the runways, too. The gun emplacements are too close to the runway edges.
I enjoy being challenged by the skill of my opponents. I don't enjoy being taken out by an unrealistic airfield set up. In my 20 years of USAF service, I don't recall runway setups like in the game.
Odd, when the beta version came out, I kind of had this same opinion. But, honestly.... why?
We have a map for pure flying and fighting, that's called "dueling arena". And, we have the WWI arena. No offense, if you enjoy being challenged by the skill of your opponents, then go to to the DA/Dueling Arena.