The Community Team Response was severely underwhelming. It did nothing to address current issues (as per SE's habit I suppose) and offered no real solution to the issue at hand. That being said, while most would probably lampoon my idea, I think it'd honestly be best method to ensure that the people who want to go to this event have the ability to, instead of giving the select few.
Cancel FanFest Vegas 2018.
Why? Numerous reasons. The Rio is obviously not suited to hold the sheer amount of people and fans that want to congregate, meet up, and have a good time with guildmates, better halves, and friends alike. Square tends to forget that people have made some serious bonds over this game, either through end game statics of FCs founded to grow and become one large family.
But where would you hold such an event with a large capacity? I mean there are tons of Convention centers in NA. But one convention center seems to fit best: the McCormick Place Convention Center in Chicago. Ironically, it's the largest convention center in North America at a whopping 2.6 MILLION square feet and it's centralized in the US (I apologize to our Canadian neighbors above.)
As far as the ticket debacle, if you're gonna send codes to people to pre-register for the event, make it so that one code = one ticket. That's it. No more of this buying multiples crap. Verify Name, Age, DOB, IG Character. Common information that Square would need to make sure that the appropriate people are getting the ticket they deserve, without the hassle of waiting in line. And no more of this "We're gonna make X amount available." With the space a convention center provides, especially this one, you should have no issue holding such a large event. Also, maybe talk to city leaders about possible commercial benefits businesses will have if they say, provide certain services that people can benefit from.
Now the date is tricky, usually around June/July an expansion is released, but...why not make Fan Fest the official Launch party of said expansion? Give people a taste, whet their palettes with new content. And furthermore, maybe even sell the expansion and collectors editions on the spot? Merch is obviously going to fly off the shelves, but come on. Common marketing and you honestly make those sales UP FRONT without having players to pay for expensive shipping just to get it in a day or two.
Given the injustice that the NA community has to face pretty regularly when it comes to meeting the people that make these bonds and ties between friends possible (I mean come on! Japan gets FATE's around the country and FF themed cafes while we get Scalp Fest with an eticket fiasco???), the least the Community team can do is pitch the idea of cancelling this. You're spoiling plans of reunions, a magical night between two souls, and essentially casting a dark cloud with talk about "We'll look at this for future events."