As far as the 223 and 14mm pistol goes, they could go for some tweaking to make it specially good for certain builds. Probably make 14mm the tin-can opener and the 223 the HIGH ALPHA damage gun.
We dont need alpha damage gun. We simply need great handgun for something. .50deagle does enormous damage, 14mm can bypass most of armors, but .223 doesnt have anything special. Its just slightly higher range with AP cost similiar to .50, with nothing to look for realy. My suggestion is remove accurate perk from it and give it one more ignore armor class and possibly increase range by +5 and make it anti escape handgun. Also I dont know why it has blinding strike.
edit: crippling strike instead of blinding strike would be awesome too, for leg destroying