What if...
What if a new quest dont depends on guides, information or shortcuts and relies more on the player skills?
Lets say you introduce a new quest with X reward item at the end, but in order to get the price you have to get trough some rooms.
In one of them there's an NPC you have to fight, and you enter that room alone, like the Zorby cave or the house where you trade the matches for the pencil (i think). No help at all. This NPC is very hard, lets say 10.0 instead of 3.0, and he is a decent sparrer. If you die you are instantly teleported to the previous room, and you need to restart the fight.
That way it doesn't matter if the information on how to complete the quest goes around in posts and guides, you still need to take your time to complete it, and if you are a lesser fighter this ends up being a very good training.
Another room can be a randomized crate-moving puzzle, so regardless if you know what you need to do there will be not any guide to help you. You need to use your brain and patience.
Another room could be a bug catching challenge with a timer: catch 10 cockroaches in less than 2 minutes and you can go on, otherwise you have to do it again.
I know this can be a lot of work on programing, and IA for a decent fighting character can be a nightmare but you can find alternatives I guess.
This will bring new forms of whining: 'It's too hard!', 'It's unfair for weaker players!'. But you just can answer 'hey, its supposed to be hard and especially for weaker players, so you can get your skills sharpened

'
But anyway, it's just an idea.