Honestly, I don't think it would be that much of a challenge to get the AI to use it, then of course I haven't seen the AI use the functionality introduced by airports. Does anyone know if the AI does use the transport troops through airports functionality?
Besides that all it would really take is the plot selection code + the action button code to handle the drop paratrooper action. What would really top-off the mod would be a nice animation of a paratrooper dropping into the plot. Any takers?