Only way I can see the game dieing so to speak. is if they stray to far from their direction, set forth on the FF14 site, they rushed it out to the market before ironing out all the details. Stances, Lore, quests. they are all there.

If SE looks back on what the true path they decided by their own site. then take ideas from the player base to build upon that. they can incorporate views from both streams combining together what the masses like. with their own direction. making FF14 stand out on its own from the rest of the games on the market.

This is just my opinion though, always loved how SE stuck to their guns and taking the uncharted path.