It's not the goal but it would be a nice side effect. I mean they already tried it with proving grounds and it did not really work out that great. The biggest challenge for the class balance team is the difference in player skill, that's why they dumbed down class gameplay and moved the difficulty to boss fights, since those can actually have difficulty settings, classes don't. So it would be in their interest du educate players more and help them improve instead of just showing them a slideshow of the lore of a dungeon and tank and spank fights for every single boss.