This has been true of FFXIV for a long time now.
The 'technology' behind FFXIV 2.0 has been stated to be not the same as FFXIV, i.e., the Crystal Engine. I don't recall articles detailing out the new engine any further (what it's based on, has it been used for MMORPGs before, etc.)
This makes me feel a little bit better about the situation. At least they recognize this as an issue and they're taking steps to rectify it. It makes you wonder what the hell Tanaka's crew was up to for the 3-some years or whatever it was they were working on the original launch...
The game right now is almost a self-admitted "leveling curve is insignificant, experience the story through accelerated levels and enjoy the content at 50 while it's still there" - and although that's not the type of MMORPG I enjoy, I'm holding out to see how this is adapted for 2.0.
I was holding out for a while too, but in the end, once it came time to start paying for the game, I didn't feel the product was worth the price. The game had not advanced sufficiently to warrant a subscription in my view. The details on the new class system were likewise a rough read for me, because they implemented precisely the system I was afraid they would, where your Job is based on your Class, and only certain classes can adopt certain Jobs. Why can a Gladiator not become a Warrior? Why can a Pugilist not become a Bard? Why does a Black Mage need to have 15 levels of pugilist? Yes, I understand the damage-dealer nature of the two jobs (thaumaturge and pugilist), but that's all they really have in common... what does a Pugilist bring to the table that a Black Mage needs?
Ok, I'm tangenting into a rant. I'm sorry man ;) My point is, speaking as a potential return customer, I'm not taking to the direction the game is headed. I'm not implying my opinion makes a damned bit of difference, and to anyone reading, remember it's just my opinion. I'm still calming down a bit from the "wtf?" moment I had when I read about the Legacy Campaign and Hyrist hadn't come by to set me straight on it yet.