When i reached 80 level, after some time i felt like i wanted a new profession, but i couldn’t choose one, and then i remembered sub-class system in lineage 2. I think it would be appropriate to make that system, when you switch to your sub-class you a kicked to like 30-40 level and just play as ordinary profession but your crafting skills disappear until you switch back to main class. Map completion would be much more fun as you wouldn’t have to do same quests again, but i think this feature must only be available to those who finished storyline, so on Sub-class you won’t be able to do high level story quests,