Mindblowingly new-old idea-question that would reduce queue times for DD's

[Astarica]

If you've been playing tank consistently in MMORPGs you'd realize there's a trend toward making tanks irrelevent which is why if you're actually good enough to play a tank back in the old days where tanking was hard, you'd gradually graviate toward another class (almost certainly DPS) once you realize your class's role is marginalized. Take the hardest 4-man DF content, AK. The hardest boss, Demon Wall, doesn't even have an aggro list (his nuking patter is random). The final boss, Anataboga, basically features the tank standing in a spot and never moving. This is because devs eventually realized that making tanking a bottleneck fails in two ways. First, you'd actually need someone good to be a tank, and second, if you've someone good at a tank, then that guy can often carry the whole group by himself and you don't want that either. This design, however, inevitably leads to a shortage in tank. Increasing the DPS to tank ratio wouldn't help much, because if you need less tanks, more tanks will realize their irrelevance and reroll as DPS and thus skewing the ratio. You can't live without tanks, but they don't need to be great players, which is why you don't have very many tanks.