I honestly don't personally care. I never liked Abyssea too much, and I was hoping for something a bit different here, but meh. I'm happy enough with the game as it is.
Also, eh.. Older MMO's are still kicking it. I think Ultima Online itself got a new expansion no more than last year or so. Unless something horribly awry goes wrong or everyone just stops playing indefinitely, I imagine SE will continue supporting this game for a good many more years yet. (Admittedly, I imagine they wanted XIV to take over for XI so they could phase out updates, but that didn't go so well and XIV's success is still in question.)