Just to disprove any suspicions of this: The drop rate has not been changed.
Aside from the fact that there's no actual need to rush, once people's levels spread out a bit more, it'll become a bit easier to hunt. But so far, you still have all the chances to easily get at least a full set in a day, from both sessions. It's just luck.
in fact you are wrong the possibility of drop if it is different even though daneos has not changed it ... the people themselves have changed the drop as you have said but do not take action against this, which is very possible thanks to the ... many ... many suggestions from users as good as adding more hours, or days like Sunday ... even if only now it is saturated with people, or add more chanels ... change the drop rate in itself .. and when there are not so many people leaving it again like this now. Possibilities to fix it there are many the thing is to do it.