People complain about big bang? I don't understand.
I started playing Maple around late 2005. The community was huge, but everyone complained about leveling. No one really liked the steep curve, so we would often goof off and be social. It was annoying leveling because you want to use the awesome skills of second and third job (this was before 4th job came out), but couldn't because leveling took forever before the skills got good.
People created dozens of private servers specifically for leveling super fast because they hated the steep curve in the original game.
I don't think fast leveling is the problem with this game. The attitude of Maplers has become so poor compared to what it was. It was always a fun game for exploring and goofing off. Now players have turned it into a "who's stronger" fest.
I personally still do quests, goof off, and explore. I never grind, unless the quest requires hunting monsters. I always end up encountering bots, a ton of "cc plz", or afk people. I still play the game as a social thing. I don't care about damage to the extent of hardcore players.
Also, Nexon made certain things easier because people kept complaining things were too hard.