I'd like to see airships be like 2-5 min ride XD (perhaps in this aspect also cost less, or have mini games - play Erozean chess with other players and npc, sky fishing O_O, defend against sky pirates, perhaps other little quests you can do like taking photos of npcs / other players.
Great time to remember life or relax and enjoy the beautiful world map*, like oh man my bladder is going to explode
.
* This world map then can be used again for player airshisp way in a future expansion. **
Perhaps after doing enough Grand Company quests you can get aether rights to other cities for a price - and the airship becomes free.
(Keep in mind, in my mind there would be one or two aethers for a -whole- region).
OutPost aethers "gates" could be introduced - I liked this aspect in FFXI because you could earn far reaching teleports in almost every zone but these zones could be lost by beastmen (or won back), so there was conflict and you actually felt that conflict. (Off topic but I hope the conflict can have other affects like NPCs in town having good or bad prices depending on which territories owned). OutPost warps do happen to keep the world connect because sometimes you are forced to remember those connections when you have lost that territory (though you can still make the world too small if you go in abundance with these out posts).