Beautiful work on a seldom seen ship!
I love the King (Coontz) Class DDG/DLG's. For my home-made CIWS guns, I used to use 1/72nd scale Sidewinder seeker heads (AIM-9B). Virtually every Phantom/Tomcat kit came with a billion of them and I would always replace them with period-correct AIM-9L missiles from the Hasegawa Aircraft In Action Weapon Set III.
Your bases for the CIWS as well as your ASROC cells could be done using simple Evergreen/Plastruct styrene block lengths. The finished "look" of the kit is precise. You've nailed the image perfectly. I wanted something like her to escort my Yorktown but thankfully Matty hooked me up with a Chicago instead!!