This is from the "Letter from the Producer LIVE II" that was posted in November.
http://forum.square-enix.com/ffxiv/t...mmary-Released
1:12:28
Q: Will new players who start playing after 2.0 get to experience the current main scenario? Also do they get to challenge instanced raids and primal battles that are available now?
A: First of all, please be aware that the main scenario and the Seventh Umbral Era aren't really the same thing. Players who start after 2.0 should be able to experience the former.
Regarding instanced raids, they will basically remain as it is and they'll be carried over to 2.0. Now with the primal battles, some plots are connected with the Seventh Umbral Era. I say that there is a good chance their appearance may change in 2.0. Some will remain the same, some won't. So basically, the current game balance and the current reward will only be available now. Some of those items already exist.
1:13:42
Q: It has been said that "The bards will sing for an eternity of battles fought and foes vanquished during these dark days." But in what form will this be available in the game?
A: As I mentioned earlier, now is the only time where certain achievements are available. On top of that, we're currently working on something quite unique regarding the character's appearance. Please consider it a sign that the character has loved living throughout that era. And of course, they may be treated differently in game. For example, players' title may change as well as NPC reactions to them may differ.