
Originally Posted by
Moonlite
snip
The zones being locked out have lore reasons behind them. I'll give Ishgard as an example.
SPOILER ALERT:
Lore-wise, Ishgard is an extremely reclusive nation. They despise outsiders, possibly to the point they would kill us on sight if they could. But by progressing through the Main Scenario and helping House Fortremps and Haurchefaunt, you get them to learn that not all outsiders are bad. So you're made the "ward" of Fortemps. This gives you a pass to enter Ishgard. Over time, you show Ishgard as a whole that outsiders are not so bad, and Aymeric helps create an alliance between Ishgard and the other city states
That is why stuff works the way it is. In the ARR zones, the story was not written around it.
Now, could they move the AST/DRK/MCH job quests to outside of Ishgard? Potentially. But the DRK storyline seems to require access to Ishgard to even start the storyline to unlock the job. So that makes things a bit more confusing.