I have a few recommendations.
Instead of having all the different types of aircraft, and aircraft services (military, commercial, GA, etc.) all haphazardly slapped together, each 'division', if you like, should have one section of the airport dedicated to it - each with its own dedicated runway, or maybe two runways each. The sections should be clearly distinguishable from each other, connected perhaps by a single taxiway.
A list of divisions I can come up with (feel free to contribute more);
Commercial
Military
GA
Helos
Miscellaneous aircraft
Airshow section
We should also arrange the sections like a ring around the tower, which will be in the center, placed on a few taxiways forming the words 'SIMV'!!!

The design of all the various buildings should be quite modern, and abstract... and each building should relate to the section it services. That's why I particularly like your idea of a concorde-shaped terminal.
I think, if we are going to have an airport in both Europe and the US, we should come up with one design for an airport and use it twice. We can attach the track to the side of the US airport.
Regards;
Spitfire