Empty or not, the problem is a shortage of tanks and healers. I play all three, when I queue DPS, I go my beast dailies. When I am about done the queue usually pop for the duty roulette. When I want to get myths, depending on my mood, I queue healer or tank and any time of the day the queue usually pops from instant to 2 minutes, where 90% of the time it is like 30 secs or less. The healer tank shortage is just that obvious.