Why is Ninja the only melee that doesn't have a gap closer skill?

[Evangela]

Like Monk's Shoulder Tackle and Dragoon's Spineshatter Dive. Even Dark Knight has one.

Ninja supposed to be the fastest and most agile job in the field but it lacks tool to move around beside Shukuchi. Shukuchi isn't that great either. It has delay time that prevent Ninja to attack immediately after using it.

Ninja also lack a back flip ability like Bard and Dragoon can jump away in a second. Shukuchi requires 2-3 second to click on the ground. And it's Bard, not even a Hunter or a Ranger. Why is a musician can be more agile than ninjas?

We have Overwhelm in PvP but that skill should be our basic skill in PvE mode. And also need an insta-back flip ability.