FFXIV completes every expansion and each expansion is 100% playable on launch. WoW gives you a very buggy launch that's so bad it is completely unplayable, then after a couple zero content patches, there's an entire year with no content and then it releases a final patch without ANY of the promised content- just a final raid and, "Oh, sorry- we didn't have time to complete the storyline! Maybe next time, suckers!"

That's how bad WoW is.