DPS queues were already longer than Tank and Support before this patch went live, because people prefer to DPS rather than bear responsibility for the team winning or losing 90% of the time.
Even if Blizzard were to roll back all the changes, you’d still have higher DPS queue times, because Blizzard can’t force people to queue for Tank/Support over DPS. As the saying goes: “You can lead a horse to water, but you can’t make it drink.”