Mistralton was a let down. It had a big open space with nothing there. I mean yeah, it's a runway and they need to be long, but if it is of no use to the players, then why is it there? They could of put more houses or something there.
If there are houses there, then it's not a runway
The runway is meant to represent the airport theme. It's just happens that the players are not the one using the airport, as it was a cargo plane airport.
But since it is an airport, it needs to have the long runway, regardless of whether we use it or not.