There has been a lot of discussion lately, in the Run-Up to Blizzcon, about Auto-leveling. Apparently there has been rumor and speculation about the next expansion deploying the same style of auto-leveling across all of the game that is employed in Legion areas, where the mobs around you are leveled to your strength [level?] or vice-versa.
I vote NO on this. There are too many aspects of the game that have grown up over the years that would be trashed by this change.