they would be worth lesser than the actual event etcs, like 2:1 or depending on the event, more or less. i think this is implemented in msea, where you can trade past etcs with the event npc for current etc or smth like that? tried to do a search but didnt see anything in feedback about this topic (correct me if im wrong). anw, what do you guys think about this idea?
Do you mean have items like Halloween candy be recyclable for next year's event use? Isn't that already the case?
IMO that would really reduce the effort needed for subsequent events, and reducing the overall event experience itself.