Happy new year!:-)
The airport is too big with too many runways, runways are expensive and they really need a good care of, make sure you leave some space (min 240m) between the roads and the runways.
I suggest you add fire stations, airline offices... and importantly add control towers to the airports.
I like that you place the airports close to the city centres, however some big airports are too close and there may be a noise problem in the residential area.
Merry Christmas and Happy new year!