I don't know if this was mentioned yet or not and don't have time to read through it right now, I have Dynamis to do =), but the scrolls of instant warp need have the rare tag removed and allowed to be stacked to 12 or 99 with options like forbidden keys do in Abyssea to choose how many you want.
Obviously with things like Voidwatch and the new proto-weypoints the devs don't have a problem with people getting around quicker. So this seems to me to be the next logical step, I can't tell you how many times I've accidentally entered Dynamis or Salvage with black mage as my sub because it's more convenient to run around as /blm than to use instant warps or warp cudgels. Anyways that's just my two cents.