They have a long way to go to reach WoW's level. 5.4 and 6.2 in WoW both lasted over a full year each.

Furthermore FF14 tends to release well polished expansions, while WoW, after a full year and 1 month of work, released WoD, an unfinished expansion with the largest amount of cut content ever, that was so bad they lost half their playerbase.

So yes, you are corrected because you're wrong.