I think it's about high time we saw the implementation of one of the most basic features of... well... any video game: the ability to jump. The fact that FFXIV launched without this functionality is frankly an embarressment in this day and age, and serves to highlight the fact that Tanaka and crew did not learn enough from FFXI.
While they labored intensely to ensure that there was a substandard market system in place of a streamlined AH at launch (with no search functions, no way to compare prices, essentially nothing that would provide players with the adequate tools to start an economy), ensured that quests were handily devoid of any actual entertainment--holding your hand through every step and making the flavor text essentially meaningless, stripped the auto-attack feature to ensure that players would have no time to coordinate or socialize while playing, and devised an attribute point allocation system that ran directly counter to the structure of the Armory System...
...they made sure to keep the game jump-free. They wouldn't want us to have the kind of fluid controls players come to expect from their games, would they?
Personally, I would love to see this feature added. For one thing, it's a constant irritation being stuck to the ground. When I accidentally veer up on a damned boulder while auto-running down the road to Laminsa and have to walk my *** back down to the road rather than just jump down... or when a foot high ledge or a gap in the floor becomes an impossible barrier... something just isn't right.
Furthermore, the addition of a jump feature opens a new dimension to the game, with the possible addition of locations requiring us to jump over obstacles or damaging floor tiles, or hop from ledge to ledge. Abilities could be added to affect jumping (Lancer, I'm looking at you), as could special gear (Boots of Bounding, Jackrabbit Pumps, Shoes of Springing, Leaping Gaiters) and there could even be some tactical uses for jumping (such as jumping to avoid a leg-sweeping move done by a certain NM or boss mob).
For those of you worried that you'll have to watch people jumping like kangaroos through Uldah... relax. First off, that'll happen for like a month or so, unil everyone gets bored and irritated by it, with some stragglers continuing to irritate us for a while... but in the end jump-gazms will go the way of Provoke macros that involve "yo mama" jokes... in emote.
Secondly, knowing SE, they'll implemented it as a (!) command in the menu (like logging, sitting or using the Crow's Lift in Laminsa) when you walk up to a ledge that allows you to jump to the other side of a gap or over an obstacle. Your character will stop moving, stand still for a second, slowly walk up to the ledge, then spring over. If we're really lucky, they might not include the zone-transfer black-out screen.
So don't worry. Have faith, they'll **** this up too.