My suggestion is scale Heart and simple events reward to you level. Heart quest you once time, so why I should get just 30 copper for one heart quest. Also like map completion, you get reward to zone level. I don’t ask reward with only excotic items, it can be rare or other items.
Orr events are different from other same zones level, reward player in small zones according your level. If you level 80 and you do in low level event, so you will get reward as you will do in 80 level zone map (except Orr maps).