A few additional suggestions (based on experience at NA fanfest 2023 vs. other, larger conventions):
- Queue inside in the air conditioning, not outside in the 100+ degree heat.
- Make better use of the space. 15K convention doesn't need to be vastly overcrowded when the venue supports 100K or more. The keynote could have been in a larger space with much more seating and standing room.
- Use line staff to manage the end of each line and make sure it is growing properly and in the right direction.
- Have line staff count people in line and have the counts in the app like PAX did for panel lines.
- Don't rely on the clunky GPS and fix the broken app if you are going to use it for battle event or other registration - also explain the process clearly in advance. And do the math as noted above. And bring back t-shirts somehow. ;-)
- Have enough space for the keynote and concerts because everyone is going to be there; also have staff maintain ADA sight lines and aisles. No mosh pit/crush area at front if possible.
- Lower the insanely deafening sound. Piano concert was crazy loud. Primals even louder with a very muddy mix and distorted amplification. Even the orchestra concert was unnecessarily amplified and too loud.
- Don't confiscate people's water bottles as happened at the orchestral concert.
- Open more food courts outside, including the north hall food court which was inexplicably closed.
- More cars on the monorail to and from the event.
- Provide official/discounted conference hotel housing options near the venue.
- Realize that attendees have an huge (huge!) demand for merch as well as food and drink.
- Provide additional seating/chilling areas besides the Quiet Room.
- Hire experienced event planners and plentiful operations staff who have successfully run larger events.
- Orchestral concert ticket presale for fanfest attendees.
- FF TCG tournament and learn-to-play sessions.
- Don't do Las Vegas in the summer. San Diego or even Reno would be fine.