Just some minor thing I would like to have to avoid annoying moments. When I build a small stand, it is already open and starts as GA stand. Then I will change something and the game immediately pops up a message that it cannot do what I want since an assigned plane is on the map. This means, yes, at once there is a GA plane incoming blocking the switches so I must keep track on when it leaves and only in the small time window between plane leaving stand an new one assigned can close the stand.
My suggestion: let the stands all start closed so we have enough time to switch stand options to our wishes. Better yet: let the game acknowledge a close/switch order and do it automatically after current plane blocking the stand leaves like ‘The stand will be closed after the occupying plane leaves. Following flights are cancelled. Proceed? Y/N’. Same for other infra like desks doing the same stuff.