From the Patch Notes:
"Alliance War & PVP
General
--Reduced the range of death notifications triggered by player enemy deaths in Cyrodiil from 600 meters to 300 meters, to help reduce the number of messages displayed in chat."
Don't reduce the range! This has been very helpful at revealing players who are exploiting D-ticks / boosting for emperor / farming AP by killing alt accounts (or friends) on other factions.
It also let's you know if that health desync bowganker who is hiding along a transit line is active.
Instead, let us be able to have the option to display this feed where we want to (aka, it could be in the normal default chat tab, or allow us to have it in its own tab in the chat window).
PC-NA