My theory is SE is keeping chocobos, airships and Ishgard for the PS3 launch so that the PS3 players have something new to look forward to. Who knows, with the delay they might even release an expansion at this time with new regions and base classes like musketeer, arcanist and shepherd that are supposed to be coming too.
In the meantime I suggest you all level a DoL to 30 to get the tier 5 speed ability. It makes running around a lot easier. Gridania to Tranquil for example you can get 3.5-4 minutes of constant quickening. If you're an archer you can use that Quickstride ability before you're out of range of grade 1 points and when you're in range of grade 3 to ensure you have quick on almost the whole route. Just one example.