Jumping would be nice in the sense that you can jump off those annoying 2 foot ledges and jump up them instead of going around. However I think to implement jump they would have to redesign a lot of the environment. Not only that it would make running from mobs EVEN EASIER then it already is. Other then the first point I think jump in FF is pretty useless. Bothered me at first for XI but then quickly realized that it is pointless.