I don't think that it will confuse many people.
I think, the people who don't know the feature wouldn't even notice the difference. How would i notice the Change, if i don't know it? I get my drops and notice what the other Players "see on the Floor". Its just that all Player get a "Price" for defeating a Boss or just killing Mobs.
It is just annoying to Join a Room, to help some low Level Char or Newbe or just for fun and have to "life with it", just because the Roomleader isnt aware of the possibility. All players i informed about the feature just changed it after leaving the Room. ^^
If i got it right, it makes no difference if i Play alone - the Droprate is unchanged. With other Players in the Room, the Droprate is a little bit lowered. Right?
So it makes no change while playing alone and a big change while playing with others.
Just my thoughts - maybe the Serverteam thinks about the possibility to change this.