Moderators ,who are players first , also have opinions and have ideas that are in the ideas section that may or may not be something Kano implements.
You do not get credit for killing someone elses boss, that is why this change was made in the first place. Why should "boss owners" get credit for a kill of their OWN boss even though they didn't do any damage?
We have an additional change in the queue that will prevent that from happening, basically checking that the boss owner has done minimum damage.
Moving to rejected as this was brought in to prevent players from reaping in the benefit / rewards of killing bosses aka. achievements but not actually building their character to be effective against bosses. The change out there right now is just phase 1, next change is to require the owner to always have to do a minimum damage.