The Aerodrome receives a +1 Gold adjacency bonus for each Neighborhood, +2 Gold from the City Center, and +4 Gold from the Commercial Hub. This will hopefully make it more attractive to build.
Additionally, the Aerodrome now no longer has a population requirement to be built, so it can be freely built in every city.
Air fighter units (Biplane, Fighter, and Jet Fighter) no longer require the Aerodrome to build. This addresses the difficulties AI have in building air units.