Since rerelease, I'd have to say that FFXIV has delivered substantially more bang for your buck than any other mmo on the market, especially for being a paid service. They've added like 15 4 man dungeons, an entire category of puggagle raid content, all of Coil (actually I forget if 1-3 was available at release or not), 15 8man trials (though to be fair, half of those are other trials with different difficulty) and like 3 progressive tiers of equipment. Not to mention expanded crafting and quest types, the whole roulette system, shitloads of mounts/pets, an entire mini-game platform, etc etc. That's like... Almost two full WoW expansions of content minus overland stuff, in a year and a half, and pretty much every other month, without being an extra box cost. All with probably the highest level of mmorpg graphics on the market right now.
Fanboy off, that's a pretty ridiculous list of shit added for any game.