Do you mean to tell me that before the game has even officially launched in playable format (despite the fact that they've been making people pay now for an unfinished product), it's already run into the problems of a game three times it's age? There's already problems with players finding parties in low levels due to a top-heavy player base, lack of low level content, and repetitive grinding for XP...
This has been true of FFXIV for a long time now.
At this point, by the time the game is in polished state (which I imagine will be a while after the release of 2.0 considering once 2.0 hits, the game will be in a state equivalent to a fresh title just released to the public), it will be using outdated technology. Christ, it's probably doing so now, though I understand they've been doing performance boosts and such.
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.)
But as a former customer, I can say the direction they're headed in will not draw me back to the game, and if the best they can hope is to hold on to a core of die-hard fans, I'm sorry, but they're wasting their money while other companies continue to advance the industry.
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.
If FFXIV 2.0 comes and it's simply a graphical overhaul with an insignificant character development through leveling philosophy MMORPG, or this is simply extended to a level cap raise to say 60 ro 70, whereby it's trivial to obtain as such and players are encouraged to faceroll through the levels as fast as possible so "the real game can being", it won't be the MMORPG for me. I understand many may enjoy this and spend countless hours with FFXIV 2.0 as a result and I wish many kudos to them, my dislikes shouldn't be a catalyst for their game decisions.