As long as jumping is not an inherent combat mechanic. Like, a one-time thing (like how i've heard that you have to /kneel before Odin in XI to evade his Zantetsuken) is acceptable, but definitely not something that a player should worry more than once every Astral Era.

That said, if it is implemented in a tasteful manner (as others said, no weirdly irregular jumps, make the movement fluid and natural-looking), it's a pretty interesting exploration tool. You probably want to leave it only required for exploration achievements and easter-egg-y stuff since... This game has no need to end up turning into a platformer or something close to it.