Wouldn't that make raiding a bit easier at times if the Whm/Sch/Brd uses the LB during some massive attack? Or even if they use it when they're the only one left and suddenly 'LOL SKREW U BOS LEMET BREEK'

Dragoons used to be invulnerable for a moment or so with Jump, something about that being because of them being at a different 'height' or something, and that was removed as soon as possible due to them using it to avoid some big AoE's and such.