They could always just make it open to everyone by adding a colonized area or an airship that would act a a central hub with an inn and then taking ideas from hunts, beast tribes, grand companies et cetera and rebalance it as an area that gatherers can quickly level to lv 60, and appeal to explorers that would offer chests with rare materials and Orchestreon scrolls as rewards for player curiosity. Oh, and the hub would be labeled as the exploration guild that would allow players to send out their grand company members on expeditions like you can do in the Final Fantasy Tactics series. Of course, Players will have a limit on their activity within the area per class.
But, they're totally most likely not in any position to request aid from SE due FF14's past failures, wary investors, and Japanese business and cultural reason's (?) that might be considered arrogant and disrespectful on Yoshi-P's part.