Thank you all for the feedback. It is really appreciated. Please give us some time to collect all the feedback you send and sort it into a list we can work on or further discuss. Some wishes are easy to implement, others might not be possible. So give us some time to assemble a list.
In the meantime we have updated the software on the server. Now every user can see all airports in the system. However, the creator of the airport is the only one able to edit it. But a user can send either a request to edit the airport of another user or a user can invite another one. This feature should be used with care.
IMPORTANT NOTICE: The server is still experimental and updates might break some airports, so we strongly recommend you export your airports after changing it, so you can import it back in again after a server issue.