Originally Posted by justRelax View Post
This is already possible via the sacrifice system, basically you sacrifice a boss drop item (gun / sword / etc.) that has level to increase the level of the quest itself.
This. ^^
Also it could be easier if you have a PVE weapon drop, and perhaps it all seems so easy because back when everyone started with quest I am sure we all though it would be hard, but after some play time you can see the basic quest is rather easy.