Yes, you cannot compare the content of FF14 and WoW at face value because of the life span difference. But what of the content per patch?

For example in a single patch WoW was able to release gigantic raids such as ICC and Ulduar each with multiple raid wings, with each raid wing having as much bosses as the whole of Coil. And that is not to mention each boss had a hard mode that changed the fight completely. And you can't even say quality over quantity as well since Mimiron firefighter alone was more complex and challenging than anything in this game.

So far FF14 seems to be releasing content that is on par with Trial of the Crusader raids. The 5 boss fights in a room was generally regarded as the laziest of Blizzard patches, something that seems like the norm here.