^ While I am not guilty of this exactly, I will say that I primarily play damage dealers and healers, so when I tank Leveling roulette for the Grand Company bucks, I am not at my greatest. With that said, I may lose threat on 1-2 mobs throughout the dungeon for a few moments, but otherwise I make sure I know what I am doing before I queue up.
My friends and I have noticed that a lot of mentors are simply not that great at their role or the game. I guess that's what happens when it measures a quantity and not any quality. I think it would be nice to force wannabe mentors through a trial that proves they know their role well, kinda like Stone, Sky and Sea.