A friend and me were discussing fun things you could do from previous Final Fantasy instalments.
An idea popped into his head that would be extremely easy to implement and would be tremendous fun. A defacto 'Festival of the Hunt'
Uldah, Limsa, Gridania once a month, year [whatever] a scored event where players fight solo against oncoming hordes of enemies throughout the city!
For those not in the know-how the 'Festival of the Hunt' was an event in the city of Lindbum where they annually release hordes of monsters for competitors to face off against. Playing as the main character you chop your way up the leader board!
Source:
http://finalfantasy.wikia.com/wiki/Festival_of_the_Hunt
http://www.youtube.com/watch?v=s7anX-XEUoM
P.S Even the music was great for it :
http://www.youtube.com/watch?v=XxYFSpQGU5Q