The increasing gap between players and bosses.

Nerfing potential is obviously not going to happen unless Nexon wants a shitstorm from their most loyal customers.

Potential is such a big part of the game now so I think it's only fair to make regular Miracle cubes available through in-game means. I think that making them as guaranteed rewards for quests and party quests would be a great way to help the unfunded and give new life to these neglected areas of MapleStory. Make them available as rewards through Azwan as well. This would encourage people to continue going to Azwan after they've obtained their desired Inner Abilities. Keep Super/Enlightening Cubes NX only. This keeps it fair in my opinion. Everyone has access to potential this way, but those who want to be godly can use NX to get to Legendary potential. Shielding Wards and Shield Scrolls should also be made available in a similar fashion.

Also, every boss equip that requires a SOK/PSOK should be tradeable until equipped like Empress equips are. Skill Books should not require SOKs at all. This would encourage people to actually kill lower level bosses like Zakum and Horntail. Currently, it's not even worth SOKing most skill books or Zakum Helmets because of how expensive NX is.