Leveling/playing DPS is actively punished

[Luizgazen]

It does though - if the group comp was 1/1/3 that increases the demand for dps by 50% - every queue pop grabs an additional dps, which means less dps in queue which means lower queue times.

Regardless, your core point is that other methods should be just as viable as dungeon spam, and you're right.

It wouldn't change anything really, the moment the queues for DPS are reduced, players like the OP who only got to tank or heal begrudingly would rush back into DPS jobs raising the queues to right were they were before...