Watching recent combat footage from the Node War showcase I've noticed there does not appear to be any form of notification confirming player kills in real time. The reason I'm bringing this up is due to experiencing first hand in other games how useful kill notifications are for the player's decision making.
For reference this is what a kill notification looks like:


Kill notifications create a positive feedback loop for the player notifying them that whatever they're doing right now is yielding the desired effects i.e killing a bunch of people. Especially in a large scale scenario where sometimes you have momentum on your side and are actively killing enemy players but you fail to recognise and take advantage of that because you're ignorant of the fact. Afterall it is extremely hard to take note of your kills in large scale PvP amidst all the chaos and adrenalin.
Players should have the option to turn on/off kill notifications so there should be no contention as to why it shouldn't exist.