Mandoble created a mod and later a script set ("Mandos Missiles") that allowed players to reconfigure aircraft loadouts while in game. It would be good to have the ability to custom design weapons loadouts for aircraft for specific tasks. i.e. ALL FFAR rockets for CAS, Hellfires for an AT mission, AA Missiles for an Air Superiority mission. You can currently remove all the magazines from aircraft but the visual representation of the weapons platforms remain.

Those scripts did far more than just this but I think this specifically would be an excellent feature.