I'm not sure if this has been posted before, probably has a million times already, but I am wondering why the sub price is so high, $15 USD is a lot right now for AUD especially for a game that is over 3 years old. I know WoW still charges the same amount and a lot of MMO's do as well but that is the problem, with so many MMORPG's around and a lot offering a better f2p model there isn't too much incentive to pay a $15 sub fee.
I know of at least 3 other people, as well as myself that have said they would Subscribe for a lower price of $5 a month. With so many other subscriptions for services like xbox live gold and ps plus that offer free games as well as streaming content like netflix there isn't a lot of money or incentive to subscribe to one game.
Cheers