I completely agree with this. Missions should not take this long to complete and the requirement of 15 nodestones (if you bought the pass that is) per day is straight-up outrageous.
If I were to make a change to the battle pass, then I'd say either scale the amount of chat points you get per level on each character or lower the requirements. I don't want to spend 4-5 hours each day playing maplestory just to complete a couple of missions for an event, and I think this applies to many more players.