2 hours seriously? anyway you should specify a bit more. I'm going to show my opinion about what I think I understood. You dont want such long waiting times, the problem is the balance between tanks/heals and dps is horrible, but it is something common and it is up to the community to use those roles. What SE can do to reduce this issue would be making the healing and tanking classes more rewarding and attractive (instant duty finder is a great incentive though). And also the choice of only letting 2/4 DD doesn't help.