I think it incentivizes the players wrong that if I kill anybody I get points for direct kill, but I you first hit him/her with a completely irrelevant fever and then kill them, I get points for kill and fever assist at the same time.
I’m not saying that hitting sb with fever and then shooting them is not a valid way to kill someone: it is. But it is no better/worse strategy to do this compared to if one can just kill the player directly. If I can kill someone just as is I get +8, if I can kill them because I first affect them with fever which makes them more vulnerable to my attack it should also be +8, both of those are similarly good achievements and there is no good reason to incentivize the latter strategy so much more (almost twice the normal-strategy kill). All it does is stimulating to shoot fevers to no effect just because I intend to ZAP or shoot the player, so why not get twice that points if I succeed.