The way i see it they are release expansion lets say half the size of EoD and build on that sooner than what we had in the past so lets say you get the first 2 maps and 3 months later you get 2 new if you have the expansion and i really dont think they will stop adding Elite Specs they may not add it every expansion to get something different instead ( Tengu Playable ) and then add some other specs later just to space a bit the release.