Final Fantasy is not a Saturday morning cartoon. If there is to be any jumping, it should be contextual, much like it has been in other iterations of the series. We're not all 5-year-olds anymore.

The use of "extreme jumping" in stuff like Seismic Shock is contextual to the use of that ability, which is used to make the ability seem more grandiose and epic. Anything other than a furry rodent bunny hopping through the La Noscean fields would be beyond illusion-breaking.

It all comes down to why you want jumping in the first place. To overcome small little ledges? Understandable. Make every ledge up to a certain height(a bit less than knee high) be mapped to have a character step up or scale it. Want to jump around like a Tigger? Go play WoW.

Plus you can't bounce around like a Tigger, 'cause there's only one.