GW2 scaling in many ways makes the whole leveling process somewhat silly.
You return to where you started but the local bandits are still just as tough as their far more senior members in later zones. No matter how legendary your accomplishments or gear, you are only as strong as everything around you (except in WvW…)
The game NOT scaling in some cases makes including leveling troublesome.
Complete a map to 100% a few levels above the recommended level, and the reward is lacking. Run a dungeon a few levels after you can, and the reward is lacking, while the difficulty is locked. Crafting XP scales, but not the stats of what you craft.
The game scaling inappropriately in one direction or another is an unbalanced pain in the ass.
Return to a certain area in a certain zone, and it’s a death trap for at-level characters or lvl 80s. Return to another area, and its god-mode. Certain skills down/up-levels are also ridiculously broken. If you find something initially too hard, pray that the scaling gods are kind when you return (especially if the situation is a forced solo like story quests)
Anet has a lot of work to do.