I used to play another MMO so I have experienced exactly what you are talking about.
But here, we have a marquee IP and, importantly, Yoshida-san. I believe the FFXIV team are artists who take pride in their accomplishments, not just salaried drones. I will risk $30 a month that they aren't just milking me for $$$.
But the minute they stop providing me with $30 worth of entertainment every month, I'll go look elsewhere. I won't repeat the mistake I made with my last MMO, where I was constantly disappointed by the game and the devs but stayed out of a sense of obligation to my raid group.
