There are some options in the middle. Maybe for Dungeons below Level 50, we could keep our skills up to level 50, but not all of our skills. That way we still get 1-2-3 combos, a couple of interesting mechanics, and a more "full" class, but we wouldn't be as overpowered compared to the lower level characters. That said, while it would make sub-50 dungeons far more enjoyable, this would be a very large effort from a coding perspective.