@JungsooLee7 I think the issue for most here is that you're directly reducing the drops acquired from hard dungeons, which is all we currently know for acquiring gear and progressing. This will stymie progression for those running hard modes, especially if boxes still drop random wep/armor
When you look at the overall changes, please look at the bigger picture with Sky Fortress and the Normal Mode Chaos raids, which will be additional content supporting your progression as well! #MapleStory2 We see feedback assuming Hard Adventure experience is the only content.