All jumping skill puzzles should give the rewards based on the level of the character doing them not the level of the zone. Its sad when your level 80 doing a jumping puzzle and you get a couple of blue level 20 items.
I notice the chests in lions arch do their rewards this way why can’t all jumping puzzle chests?
Since Jumping puzzles are about platforming and not level dependant this owuld be the best way to divy out rewards.