Well, I certainly hope you folks can use these "extra tickets" you are considering buying. I have not seen anything about changing "ticket holder info"; if there is, I hope you can get it worked out.

http://ffxiv-fanfest.com/na/faq.php
Q. Can I transfer my ticket to someone else?

A. No, tickets are non-transferable. IDs are checked at the door and admission badges are given only to persons matching photo identification.


Q. How much are tickets to Fan Festival 2014?

A. General Admission is $120. Currently, all available online tickets are sold out. A very limited quantity of tickets will be sold on-site on the first day of Fan Festival for $135.