The only real way to solve DPS queues

[Ayer2015]

DPS queues are long, have always been long, and will continue to be long.

Adding a new Tank or Healer isn't going to incentivise people to play Tank or Healer.. It will just shuffle current Tanks or Healers onto those new classes.

The only true solution to increase demand is to also increase supply.

Its the price people pay for playing the most saturated role. If you want shorter queues, play a different role.