[1.2.318] All changed mobs

Just by looking at the monsters' levels, it seems like Nexon is taking more of an approach toward linear progression through the areas. Right now, everything's totally scattered, I doubt that you'd be able to find monsters suitable for your level if you were a new player who didn't know anything about the game. You'd stumble into ariant when you're like level 50 and be like, "I might've actually be able to use this 30 levels ago" or take the boat ride to leafre and not be able to hit anything. They're also trying to make the monsters leading up to party quests and major bosses more suitable because right now you could be a new player at level 90 or something not knowing everything about the game (theoretically) being able to take on the cerebeses and bains outside of zakum and decide to take zakum on with your similarly-leveled friends (theoretically) and get destroyed.