I do believe they will allow a one time World Shift from the already existant worlds to Hydra and from Hydra to other worlds like they did with Hades when it was released.
I mean, it would be really homo if the X-Box 360 players got to level 50+ on their own world, started shaping an economy and were suddenly forced to go somewhere else.
Btw I didnt know you couldnt lose exp on lvl 1 and 2 X) Even though you lose 10% exp when you die in FFXI, it really isnt that bad at all. I mean, on level 50, if I die, it takes me 3-4 battles (depending on the party formation, around 60 secs each battle) to get the exp back sweatdrop Besides, as you get higher level you will get careful parties, with experienced pullers/tankers, and rarely ever die.
BUT, there will be really sucky days, where you will die 4 times just trying to reach the camp. It's all good though. Play at your own pace and dont stress yourself much over deaths and exp. I'm not sure if it's my long experience with MMORPGs, but I play in a very relaxed way when it comes to leveling/grinding/exp loss (I even make fun of my own deaths XD unless they are caused by stupidity like the WHM or RDM going afk without saying or just not healing because they arent paying attention).