it could be so much better if enemy died when you shot them

It seams to work just like BF3 as for the shooting and killing people. Remember there is bullet spread and how you fire counts hip vs aimed vs prone.

Also its day one of the beta to early to make decisions.

I see alot of "tweaks" in BF4's future, but for a first day Beta - not too bad overall

I actually found that my bullets go where I want them to far more often than any previous Battlefield.