It does make sense when you also consider that sprint will tend to be a magic job's only movement ability (BLM has manip but they need a good target for it to be at all useful... use with mouseover for a good time!). Most melee jobs have some method of engaging/disengaging quickly and/or repeatedly. Tanks get kind of hosed there but they don't tend to have to run around nearly as much in any event. BRD and MCH can turn off their bow/gun mage stance and run around all they want until they're in position and can turn it back on again.

Now what I'd like to see is getting disconnected NOT draining your entire TP pool. That's some bs right there.