I was wondering what those were! I was also noticing how awkward they are to look at as a quick glancing reference... Single target threat I have absolutely no issues with. Even most packs I don't. When I'm dealing with 4 or 5 monsters, and that jackhole of a Dragoon starts jumping on everything he can, pulls aggro, runs to the healer, healers saves his life, pulls aggro, I'm now hemorrhaging resources trying to get things back to normal...
Actually scratch this, even with a threat meter, I'd still want to punch him in the face.