MP is completely irrelevant for every physical dps and 2 of the tanks, yet not only is there no option to hide it, there isn't even a option to move it independently of HP. why?

if i'm playing a warrior, i don't want my screen occupied by a pointless mana bar. if i'm playing a black mage, i don't want my screen occupied by a pointless HP bar (that's a healer problem, as far as i'm concerned)

why are we still not able to move HP and MP bars independently of each other?