This content is no different from other zone restrictions in Sky, Sea, etc. More relevant an analogy is Shinryu, and people accessed that just fine with time. I understand all the previous VW fights were open, but certainly with the precedent in game, it should not come as a shock that for the final chapter people were required to be up on their cutscenes to access the final fight.

I saw plenty of Jeuno shouts on my server last night too. Start your own shout (only need like 6 people for cities, maybe 12 for lower Jeuno tiers).