Hoi! so i have ntoiced that sometimes you get the sound of hitting a moffo with the katana but the damage doesnt coem out until you finish the whole slashing animation, this seems to hapen a lot in situations where you get killed mid-slashing animation.
thats all
There is an intentional delay with the damage dealt on melee weapons. The damage won’t actually hit until the melee weapon reaches the length of it’s swing (if you stabbed with a real knife/sword, it wouldn’t damage something until it actually hit it, would it?). 
Heavy attack has a longer delay, due to it dealing more damage… it takes more time to actual “charge up” and eventually hit. 
However, if it is even more delayed than it should be, this could be caused by connection lag or anything of the sorts. Not 100% sure… do you have any video demonstrating the problem you have? :s
@Faraleth Wish i could, I udnerstnad the dealy but the audio shouldnt paly unelss you actually deal damage, jsut liek the hitmarker beeps