The "Road to X" Boost is very very strong, i recall seeing someone get 2 Levels at once on a Leveling Roulette ... You outgro everything way to fast, and a player who knows their way around gear can counter this easy.

A new player will fall into a spiral of "why would i do sub quests? i dont need the exp and the gear is already 10 level below me" ... and suddenly their lv 50 in lv 30 gear and lv 5 right side. And thats just the gear part, Skills are gained so fast their not understood ... but hey ... ppl like to level fast, even if they will also hit the floor fast after.

The first proper forced leveling of gear is at 50 when you get spoon fed some 110-130 (its been to long i dont remember the value) gear. Before that its "well i got this in a dungeon and its the best i have"