I’d like to see the quests have multiple levels of difficulty, say Easy, Moderate, Hard, Very Hard, and Insane. The harder the difficulty, the higher the WE cost and the higher the rewards. Same number of stages for each difficulty level, and rewards clearly displayed for each level
When a quest pops up , the player would select what level (only 1) they wanted to play. That choice would then be locked, but the player could keep trying until they finished it, like we have now.
So a newer player could choose easy or moderate and be able to complete them, or choose a harder level, and perhaps not complete it, but get better rewards if they did. An end game player could choose to try Insane difficulty for the best rewards, or could choose an easier level, but could still only choose and complete one difficulty level for that particular quest.
I don’t think any of the routine quests should include nonfarmable mats or emblems in the rewards, since those have their own quests.
High end farmables or craftables, or larger numbers of lower end farmables. I’d gladly do a quest that offered me 30 backpacks, 15 tornado nuggets and a couple of super mana potions