I am not siding one way or another, but there is always a potential for things to be changed. DK Online had an open PK system in KR version but now it's a toggle version in the US.
If there is enough general consensus amongst the community for the PK to be removed from certain maps, it can always be petitioned to Aeria and then to the devs to change it. But as others have already said, the devs make the final decision, not Aeria.