I’m not sure what you want devs to do. It’s inherantly a player problem. They gave tanks more rewards most of the time, near instant queues and the ability to be just about demigods in world content: Seen a tank solo one of the world bosses, even.
It’s just people don’t want to play tanks. I don’t want to, it seems miserable being under the microscope of 4+ players and expected to rush nonstop through most content as if it’s a speedrun, and I imagine that is a pretty common sentiment.