Create an item that decrease the xp recieved

[AmiableApkallu]

your level is going to be at least ten over the zones your quests send you to, so there is no thrill to first-time exploring new zones when you've only just gotten to them in the story but you already know nothing is going to try to attack you unless you attack first

That's already the case for every zone? If you want to engage a trash mob, you run towards it and attack it. If you want to avoid it, you... simply go around it. There's nothing magical or difficult about aggro mechanics.

On the other hand, side quests... those should sync to your current level, for sure.