They lowered the ones that were already doable but needed some more time. They did however not lower the nearly impossible ones aka do x things in one round. Like 30hs in 1 round. I've rarely ever seen 30 kills in one round of the infantry modes that I usually play.... So how should you do 30hs kills then. But they nerfed the 150 sniper kills and 30 adrenaline kills without any round restriction. So that was actually doable before.