[Ave]

First of all I hate the constructions, they are damn annoying to build (requires extra clicking, which in long run comes annoying) and they add from little to non tactics to the game.

rather make the constructions some prosentical thing u can change to get the features and bonuses u need.

about the airport system, it just makes the game more complicated, basicly we can add lots of constructions that u need to make to get access to something, but that basicly brings us back to the generation of research, construction as it used to be.

how ever, if we wana target structures (which I am not sure is a good thing to kill peoples developement) then there should be more ways to target them and with some logick involved as u suggested.