The balancing excuse is utter rubbish. They probably thought people would keep switching mains until those legacy OP items become unused and therefore obsolete. Which obviously didn't happen. Now we have players running around with a $10,000 item dominating the game.
What about the insane difficult? I spent like 6 hours on the SAME jump quest! If you get hit you die and go all the way back to the starting point, with a timer, and when you reach the end it says "the door is blocked, the elevator is broken, find another way" and you must do the same thing all over with the timer still running. I had to give up entirelly because you can't even take a break and save your progress! This is not healthy, god..seriouslly, I ended up with no coins and a headache. My eyes were burning for staying so long looking at the monitor trying to finish the jump quest. Im seriouslly concerned about what Nexon consider healthy to the game and players. Whoever created this event full of bugs and insane difficult to be done in 20 days is a sadistic.