I sort of liked how FFXI had those campaign events and that other one where the monsters would attack the city itself. It would be interesting if FATEs actually had an effect on the zone itself. I don't know what would make sense for this particular game, but I recall that in FFXI (broken record), if no city "owned" a particular region, there was no way to obtain some item needed for an oft-used item, making everyone on the server suffer due to the supply plummeting.