The world seems plenty big enough to me. How much more time do I have to spend just to get from the Waking Sands to Ul'Dah? It is 3 minutes by Chocobo porter. It is easily double that to run with sprints mixed in. And you haven't even gone all that far. I think player will start to get annoyed if takes 10 minutes to just go between places to do their main quest.
