My question is why didn't they make the reward system something like this:
Floor 20 Boss: 75% NQ, 20% +1, 5% +2
Floor 40 Boss: 10% NQ, 50% +1, 30% +2, 10% +3
Floor 60 Boss: 10% +1, 50% +2, 30% +3, 10% +4
Floor 80 Boss: 10% +2, 50% +3, 30% +4, 10% HQ
Floor 100 Boss: 30% +4, 70% HQ
Of course the percentages could tweaked but the bottom line is there should be a chance at a better tier reward that varies with how high you go. It's still luck based but it gives more players hope than merely the highly skilled with third party tools.