It could also be a habit for some Dragoons from the early days of 2.0, before they tweaked the servers' read time, when using the Jumps was more of a liability than a benefit. A common statement among Dragoons was "We have these cool Jumps but they're just such ass." So old habits can be a little hard to die.

I haven't checked in awhile, so I don't know if the Rotation Reborn thread has been updated recently, but I'm trying to weave my various Jumps in. Though, right now, I'm using them more as gap-closers.