What I find funny is that the majority of people who want jump either dont have a reason for it or want it for some cosmetic reason. There are very few legitimate reasons for jump. You can walk down ledges already, so you want a jump to do that exact same thing just so you get the illusion that you are "falling"? Pointless much? There aren't even many instances where jumping up a ledge would be useful. Seriously, if at this point you are having problems navigating the land, then I'm fairly certain the lack of a jump button isn't whats causing your problem. Turn off the game and just walk away.

Like others said, the game was NOT DESIGNED with a free jump in mind and will ultimately make the game buggier than hell since people are going to find ways to lodge themselves in areas that weren't meant to be accessed and glitch enemies and so on and so forth. To prevent this, EVERY area would need to be reworked or redone to prevent this sort of activity. Do you realize how much work that equates to just so you can "fall" down a cliff instead of walking or because you can't follow a simple path ? I don't even care about bunny hoppers (even though I've in fact been plagued by them in several MMOs) as much as the technical issues it WILL cause if implemented.

I did forget to mention that all I saw on Jump was "examination" of the feature, not implementation. And even so, it may only be an emote like they were saying. Don't get all high and mighty yet until you see it implemented