I'm not sure about this being the right subforum, so if it's wrong, an admin may move it please...
I have an idea, what if, with the next patch or via hotfix, an "hidden" NPC "trader" could be added with following two options:
"I'd like to have my current active quest reset please" and
"I'd like to have removed one item from my inventory please"
The trader could be made known through a letter via the courier.
Maybe the quest reset option could be even added to the quest-giver...
I've read and also experienced so many times that, especially random quests (college of winterhold, getting the books for the library) with random locations, can't be finished 'cause you've been in that cave/dungeon/whatever before...
Also sometimes, even after the quest is completed, some "remainings" stay in the inventory (Hjerim/blood on the ice quest - the amulet, if you don't sell it...)
With my idea, that problems could be easily solved...
What do you think about that?