Now, let me preface by stating I am super thankful I was able to go to Fanfest - plenty of people wanted to go, but there weren't enough tickets out there (although I think the argument that they sold way too many tickets for the setup they had could be made).
For one, security, maneuverability and seating were major issues at the Vegas Fanfest. There weren't enough chairs in any capacity to seat over a quarter to a third of participants for panels or concerts (although ironically Tokyo Dome is ALL THE CHAIRS). Two, I don't need to rehash the ADA debacle. Three, getting food and water and getting to the bathroom was a nightmare in Vegas just from the general setup. I'm not even going to mention the issue that was the merch line.
Yet what really gets me is the Asura challenge. I'm a midcore non-Savage raider who was so proud to down Asura with my friends first pull (at least I got to participate, which was an issue for a ton if people). At the end, there was really no reward. No card, or shirt, or anything that has been present for other challenge fights.
Yet the JP Fanfest got cards for winning.
I just can't help but feel like the NA Fanfest was definitely the one cared least about when it came to logistics.