What could be done, would be :
- have leveling dungeons of new expansions more exploratory type to make them more impactful on 1st time and fun to replay (and add more pexing ways like Bozja right at start of expansion, for those who want to power level and really couldn't care less about exploratory dungeons)
- have the endgame dungeons added at max level straightforward (you will need to farm them for tomestones or relic, so you want speed and not some guy gallivanting around the place).