The game we shall not speak of is just the flavor of the month. Just like any MMO. Rift had players leave to play that instead; a lot I know had come back.
I'm sure if SE plays the advertising game well enough FFXIV 2.0 will go through the same thing. Horrid login issues and suffer being the flavor of the month.
One final thought, dungeon crawlers get old pretty fast. Unless, of course, you're just super into dungeon crawling and obsessed with phat lootz.
