Ummm, whoever posted that vox doesnt run after ppl when they go to get healed is wrong. IF you are the one she is aggroes onto and are the one with the most aggro by enough she will follow you out of the cave, down the halls and to your most certain doom. I have seen it while helping a raid (damn 52 cap) and it wasnt pretty, thats the real reason they need to raise the level cap, lvl 50's now dont know how to listen hehe
But given that the zone is an outdoor zone gives casters and healers a chance to get out of AoE range (Unlike vox raids when a dumb tank gets aggro and runs for healers before the dragon picks another target, and as consequence the healers and casters have to suck down yummy AoE).