In PVP Multiplayer is AP munition and/or the penetrator skill too strong. AP munition gives now -50% Target armor. The penetrator skill gives additional 50% penetration with AP rounds. The result is (I've tested this), that you can actually achieve 100% penetration to player armor. It means, that ranged damage dealt to heavy armor is the same as if you were naked. Then movement penalty, skills, modifications and work invested into armor is almost for nothing. Clearly wrong balanced mechanic.