The reason you couldn't find any entrances to the other zones, such as Coerthas or Mor Dhona, was because they put in placeholder blockings, such as rocks or boulders or cordoned off paths or what have you. They did the same thing back before Phase 3 when it came to going anywhere that wasn't Gridania or The Black Shroud, really; a bunch of rocks on the path to Thanalan so you couldn't go there, and so you weren't simply met with an invisible wall on an otherwise open path.
Dollars to donuts they'll be available when the game releases (I'm not about to make guesses about Open Beta, but who knows?). They're not going to make those quest-only zones. I'll eat a bowler hat if they do.
Edited, Jul 25th 2013 9:52pm by Satisiun
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Final Fantasy XI Character(s) Name: Satisiun
Server: Carbuncle (RIP Gilgamesh)
Jobs: 99DRG, 99PLD, 99RDM, 99WHM | Everything else: 50-60
~Retired.~ Final Fantasy XIV Character(s) Name: Satisiun Desain
Server(s): Sargantas (primary)
DoW/DoM/DoH/DoL: 50