I think you missed it when they said, "...limited player base". The PvP here isn't anywhere near as popular as you think it is. Yes, people did the PvP but it was just to get the mount(s) and fancier armor for use as glamour. After that they were done because it's not what you play a Final Fantasy for. Even Ballista in XI had a small population of participants because there were substantially more players that just didn't care. Like Ballista, Frontlines and Wolves Den have no bearing on the game as a whole. You want to get people interested in PvP enough that it impacts the queues, then Square would have to tie it into the game more vitally than the diversion it currently is, give a reason to care who holds territories or how many wins in the Den you've accrued. Without that you're never going to see an improvement in your queues.