Tile format
Other, multiplayer, economic.
My suggestion
Add an Airport builder, allowing us to build our own airports from scratch. It could bring the number of airports way high.
How would it work in the game.
You pick a location, and build your airport! You have a menu of models such as: Jetways, terminals, runways, taxiways, gates, etc. you can share your airport with other players, BUT they can only Use it. You can set settings for your airport, and you can get funds for construction. (Not operations) Am going to leave the rest to the devs.
Why is this a good idea?
Because it compete the devs goal to increase the number of playable airports. And we can get creative.
Image or reference
Making one… give it a minute.
Note: I will be makeing changes to this topic to make the idea more clear.
Feel free to chat about the idea below!