If running around was too much of an issue SE should make the "Swift Shoes" effect available everywhere. As of right now getting around is not catastrophic. For all abyssea related stuff, you can warp to maws, and use confluxs to warp around the zone saving you hours. As for outside abyssea, we have chocobos, OPs, teles, etc.

IF I'm not mistaken, every job in the game can get some form of gear that increases movement speed. Sure some are tougher to get than others, but that is what makes the game fun-to go collect gear.