Thats a known bug, the 0% health thing. They aren't actually on 0%, so all it does it piss you off.
The hit reg isn't too bad, but maybe I've just got used to it. There are a few new gun mechanic things which also cause it to look like you're shooting blanks at the guy. Like if you start shooting before ADSing then you get mad bullet deviation, you need to wait for a split second after ADSing to remove the bullet deviation. Also moving in BF4 whilst shooting also gives a rather big penalty to your bullet deviation. Its a problem for me because I've developed that habit from BF3, strafing whilst shooting.





