Please Seperate Cast Bars in HUD

If you guys insist on having bosses that use AoE attacks that display no visual indicator (Garuda's slipstream, Cyclops' 100-ton swing) then can you PLEASE add the option in the HUD layout for use to move and enlarge the enemies cast bars? The fight should not be me constantly looking up at the enemies health bar to make sure it isn't using it's AoE attack. I should be able to put the cast bar in a more convenient place without having to have my target and targets target right there too. If I have to constantly keep looking up at the health bar to catch that cast time, I'm sacrificing awareness that could be otherwise utilized in my rotation or other mechanics.