Footwork is actually affected by Martial arts. at LV 65 Base delay for footwork is 500, with Martial Arts lv 75 it's 480, and at lv 82 it decreases to 460.
That was a glitch. That got patched (if i recall correctly). I remember ppl bitching about their xhit going down at the 80-85 update. (which if you didn't have enough store tp gear, that martial arts trait actually lowered your damage)