Low level dungeons do not need any kinds of nerfs. The only reason they take longer than a level 60 dungeon or even a level 50 dungeon is because of a lack of a full rotation, and lack of stronger skills that come with leveling. Not because they're hard, or because mobs have more HP.

Please stop asking for nerfs. All dungeons in this game are already mind-numbingly easy. There's no reason to make them even easier.