Just NO, I have experienced gear/level sync in Tera for example. The result the level synced players act like god and just generally screw people over. We get the skills at certain levels to scale with the content.

As for just reduce the threat/potency, you do know how much programming would be involved to create a system that is flawed. They have a system that works, Sooo sorry you cant steamroll the dungeon.
You do only need to do 1 low level roulette a day, while leveling. Once your 50 just stop doing it, if you choose to queue for low level knowing you are going to get level synced, man up and stop whining.

(watched too many Xeno videos 'Man Mode')