Now before you say,
'Use the searchbox'
'This has been suggested previously'
This idea has been modified.
As I was browsing my airlines alliance network and the Airport network (where all airlines fly out of) I noticed some, well rather peculiar routes, such as Iceland to Mali, or Vladivostok to Auckland. With the huge amount of spamlines covering the globe making AE worlds as realistic as possible is next to nothing, likely because players are eager to spam any airport that looks appeasing due to inexperience.
So, here's what I suggest.
If enough alliances (such as DWA, Azure and Globe) submit a request for all 3 airlines to work in one private world, at the request of a Developer (requested to Yuxi) then they would be allowed to operate in a normal world (something very similar to Rdelta) like in the actual world (Star, Skyteam and Oneworld).
The catch is, four alliances maximum and the world would only allow up to 70-100 airlines to keep things short. Because of the amount of alliances the server couldn't possibly handle one world each so why not divide between 3? Golden, National and Skyworld could all keep ops running in their private world whilst others do it in the same fashion. This also doesn't mean you can't operate in Rdelta anymore if you want the experience of other alliances, more alliances.